You're pretty much in the same boat as me bro. 25, qualified at certain things, doing well but no idea what to do with life!
I'm not a fan of conventional forms of learning, after all I didn't learn much at school and all my profitable skills have been self taught. Nor am I a fan of tying myself up for years dedicating myself to a certain skill or qualification, so I'd avoid 'going back to school', but that's just me.
Will be interesting to hear what some of the older members think, hindsight is a wonderful thing after all.
For what it's worth, if I had bigger balls; I'd sell my house, car, businesses and pretty much everything I own with the aim to opening a designer menswear and lifestyle store somewhere like Australia. Problem is I'd probably be £150K down before the doors open and that's a big risk.