Ostarine is definitely the GOAT option if you truly want to get good lean muscle gains. It also helps with your recovery. I would add some RAD to it or maybe some S4.
Hcgenerate is definitely the GOAT. It's got a bunch of supplements all in one. That's why a lot of people like to use it whether you're on cycle, off cycle, or in PCT.
A lot of guys are able to make a decent living on social media these days and it can fund their bodybuilding so for that social media can be a good thing. I agree overall it's probably more bad.
You can start with SARMs at your age, sure, but keep the cycle just eight weeks. You can continue using the GW as it's not hormonal. You want to stay away from more of the hormonal SARMs.