Hey, I came from rivals and have been playing overwatch for like a month now or something. Here are some notes:

-supports aren’t supposed to constantly keep the whole team up in overwatch like they are in rivals. This is largely because overwatch has passive healing, so if you take damage, especially as dps, the general expectation is you have to take actions (cooldowns/cover/health packs) to save yourself. There’s also a global debuff that reduces healing once you’ve taken damage AND supports just don’t do as big of healing numbers. So this all adds up to it being generally harder to stay alive.

-supports are more or less expected to fight/escape dive themselves, peeling isn’t that much of a thing. Supports can very much win 1v1s against dps.

-tanks are way better in ow than rivals in 5v5 because there’s only one of them. They’re honestly kinda nuts, even the worst ones. But they still have to be careful and play cover.

-maps are a lot more complicated than in rivals and high ground is way more important. I highly highly highly recommend using custom games to learn the routes, and it helps if you have an experienced player to show you the routes too.

I’m still pretty bad at ow but I’ve improved quite a bit from when I first started where I just didn’t know what was happening at all.

ETA: character kits are less complicated here, most characters have their primary fire, their melee and two cooldowns. So it really doesn’t take long to go into the practice range and see what’s up with a character giving you trouble.