EA App works great with Bottles. I haven’t tried Ubisoft Connect myself, but the website says it works on a “gold” level - so might have some problems.

You can use the Bottles installers for that: https://docs.usebottles.com/bottles/installers Here’s the list of all apps they have preconfigured: https://usebottles.com/appstore/

Well, these launchers can be a bit confusing at first, but you will get used to all that. And if you still have questions, that’s what the community is here for.

You can select GE-Proton in Heroic under “Wine Manager”.

Most games simply work for me in Heroic but sometimes I have to try a few versions until it’s working properly.