I'll preface this by saying yeah, it's really cool that you're owning up to your mistakes- definitely a mistake.
No, this isn't just someone coming out; this is a huge lie that involved many, many people and quite possibly hurt a few of them. That should not be forgotten, and should not be understated. You've also pretty much obliterated every shred of credibility you had, and will have in the future. That's important, and should not be taken lightly or forgiven easily. You don't deserve a clean slate in any way, shape, or form.
Yes, this is the internet- people lie. Everything should be taken with a grain of salt, unless extensively proven. That does not excuse your actions, nor anyone else's, because you know this isn't the first time someone's done this in this community. It's inexcusable, especially because it's not only you that'll reap consequences from this. The pictures you used for over a year to pose as, and the people who trusted you. That trust is gone, and rightly so.
No, it's not just okay. It's not a silly mistake, and it shouldn't be treated as such. You're not brave for coming clean after a year, especially because you didn't want to do this yourself- you got caught. As much as you can now say that you're the same person you were regardless of gender, the fact that you were so comfortable pulling this shit for so long puts everything we've known about you into suspicion. Regardless of you not thinking you would stick around, nobody deserves to be lied to in the first place.
So no, I don't believe you deserve praise like you've already received. I don't think anyone should trust the things you've said, or the things you will say for a while. I think it's despicable in the nicest of terms. It's not bravery, it's not admirable. It's cowardice and should be treated as such.
for clarification; this is not someone coming out as transgender; this is someone coming clean from a lie.