DC Universe (soon to be DC Universe Infinite) seems to be the best source for DC material in digital form. Comixology also works but is more expensive in the long run. Those are the only two legal options I know, really, and it’s against the guidelines to suggest an illegal website for such a thing.

As for recommendations on Teen Titans, I’ve read every Titans title ever made, so I have you covered there. Just let me know in one way or another what you’re hoping for most from Titans recommendations. Maybe you’re wanting a good starting point for understanding the larger lore. Maybe you’re just wanting good stories and don’t care where in the publication timeline they fall. Maybe you have certain characters you like and you’d like to read titles that include them on the roster. Whatever works.

I have read a few Doom Patrol titles, too, and I understand a decent amount about the ones I haven’t read. So you could ask about DP as well, although I would welcome a more knowledgeable user to come in as well on that point.

@N8THGR852 i don’t really have a specific character really for the titans So I guess what’s a good starting point but I will say my favorite characters in the titans are robin, cyborg, and beast boy but if I’m right there were two robins dick Grayson and damian that were in the titans but dick is my favorite robin lol. And I’ll check out DC Universe.

All four male Robins have been Titans. Sounds like the best place for you is New Teen Titans, if you can handle older (but still immaculate) art. I’ll paste my usual NTT pitch below. It’ll be a bit long, but it’s informative, so give it a go.

One of the greatest runs in DC history is the New Teen Titans (NTT) run of the '80s. For a decent while, it was DC's top-seller, outdoing titles such as Superman, Batman, Wonder Woman, Flash, Green Lantern, etc. On top of selling well, it has been greatly-received in terms of ratings and whatnot. That's to say that the run is genuinely regarded as one of DC's finest, so if you're looking into reading some of the highest quality runs DC has to offer, New Teen Titans should be on your list.

Here's a little information on why this run is important / how it impacts the DC Universe. Firstly, it is the run that put the Titans on the map. Before, sure they existed, but they had limited popularity. This run was so well-received that it made the Titans important. Continuing with that train of thought, this run introduced characters who are now very well-known and established characters within the DC Universe. Cyborg, Starfire, and Raven were created for this run, and they have been mainstay Titans for most of the time since their inception (for the most part). This run also made Gar Logan important. He had a limited role as Beast Boy before New Teen Titans. For NTT, he changed his name to Changeling for 20 years of publication but is now Beast Boy again. Anyhow, those four are probably four of the most popular and well-known Titans (thanks predominantly to the animated series where versions of them all starred). The run also had Dick Grayson become Nightwing -- where he now stands as one of DC's most iconic and beloved characters. And this run introduced Deathstroke, who remained as a recurring character in the title for most of its duration, both as an enemy and as an ally. This run also has the storyline known as "The Judas Contract," which is the most famous and well-received Titans storyline to this day. That's the storyline that heavily features Terra and introduces Jericho, who becomes a member of their roster for over 100 issues after this storyline and is often viewed as one of the eight primary NTT members. Loads of other characters were introduced and/or became Titans in this era, too.

Here's a little information about the logistics of this run. The NTT run was heralded by writer and penciler/co-plotter team Marv Wolfman and George Perez. They are an instance where writer and penciler are so in-sync that the resulting product is simply fantastic. That's not always a common occurrence with writer/penciler combinations. Anyhow, the run consists of a few titles. I will list them in the way you would type into the search bar here to find the titles' pages on the wiki. It starts with New Teen Titans Vol 1, which lasts from 1980-1984 and comprises issues 1-40 + annuals 1-2. The numbering continues but the title name changes to Tales of the Teen Titans, which lasts from 1984-1985 and comprises issues 41-59 + annual 3 (it technically goes on further, but from issue 60 onward, the issues are only reprints of New Teen Titans Vol 2, which I will be describing next). Oh look, we're already here! After issue 59 of TotTT, next up to read is New Teen Titans Vol 2, which lasts from 1984-1988 and comprises issues 1-49 + annuals 1-4. After that, the numbering continues but the title changes to New Titans Vol 1, which lasts from 1988-1996 and comprises issues 50-130, issue 0, annuals 5-11, and the Titans $ell-Out Special. The four-issue miniseries titled Tales of the New Teen Titans issue also in there. I know this is a long run, but it's a fun one. Don’t let it overwhelm you, haha.

The more you read on DCU, the more bang you get for your buck. One new comic issue is $4. DCU is $8/month, which means if you only read two issues in one month, you’re breaking even. But with each additional issue read, the cheaper each issue effectively is. It’s a good deal.

If you have amazon prime, you can read some ecomics for free including Kingdom Come.

And if your local library has ebooks, that's always an option.