Don't start founding companies yet. You'll just spend all your time doing paperwork and not enough writing code. Seriously; you have NO IDEA how much paperwork the inland revenue can throw at you. PAYE takes either a lot of doing or a lot of paying accountants to do. You can avoid it by not operating payroll, but then you just have to constantly have arguments with HMRC about how you're "not allowed" to do that (you are, but they don't like it) and that chews up time as well.
Get on with writing code. When the games are running and saleable, THEN you can go do the company founding thing.