StickyNick

Alright people Literally just getting back into cycling as a hobby for the first time like 3 or 4 years now. I used to just ride around town or go on short road rides on my old Giant mountain bike when I wasn't in school but I wanna try something a little different. I just have no idea where to start, I'm quite a big bloke, and I'm on a budget so can't go splashing mega money for a bike =/ Any advice?