The important thing is to not stress yourself out. It’s like riding a bicycle. It will come back for sure, don’t worry about that part!
First of all, unless you really have issues with FL, I suggest you stick with it. Absolutely nothing wrong with it. All DAWs are good in their own way nowadays. Just one less thing to worry about.
That’s actually one way to get back into the swing of things gradually. Just focus on making your own sounds. Be it via synthesis. Or sampling. Just start building your own sample packs and patches. Separate that process from the process of working on tracks. Maybe get some hardware, if you have a bit of disposable income. Since you had been out for 5 years, I have some good news for you on that front: there has been an explosion of all kinds of cool and affordable boxes. Get one of them and spend a month doing nothing but tinkering with it, learning it inside out and sampling it. Or get a cheap Zoom recorded and go outside and sample everything. Then process the shit out of it all in FL. Boom. Something you can call your own (and nobody else can).
I think you’re psyching yourself out. You want to get to writing your masterpieces straight away and it all feels very overwhelming. Don’t do that. Do the opposite. Give yourself permission to make the shittiest piece of crap possible. Like, seriously. If someone asked you to make the worst piece of shit track imaginable, what would you do? Then go and do that. Or just say: I’m going to make the most generic version of X. And go do that. The important thing is to start and finish something. Anything.
Alternatively, the Beat Battles on this very site is absolutely perfect for something like this. They are usually 1-2 weeks in duration and someone posts a sample pack and some rules and you just crank out a track without hopefully overthinking it. It should take some pressure off. You’re not writing your masterpiece. You are just making something within very specific limitations. With other people. And there’s a deadline. So there’s not a whole lot of time to sit there and deliberate shit. You just need to get on with it. We just finished one (https://idmforums.com/t/bb101-acidheads-delight), so keep an eye out for the next one in the Community Projects subforum . But there’s also the 808 and 909 day tracks that are still ongoing and you can get something in for those: