Buy a cheap 172 .. £1500-2000.
Buy some sticky rubber .. £500.
Go have fun. See what you want to do next.
Frayz was running rings round everything in his standard 182 at Snetterton last year - the only thing different to how it left the factory was some RSR rubber.
Few people asked him what power he was running as they didn't believe him.
@
Daniel was also having a blast in a fairly standard 182 at Llandow a couple of years ago.
I ran a standard 182 on awful tyres at Bedford last year and it was an absolute hoot ! I'm used to much faster things on the road - I'm not coming from a 1.2...
Don't need to spend a fortune to have fun (as that AX vid shows!).
If you really decide you need 3x the power or RWD, sell the Clio for what you paid for it (or more!) and buy another car !
Bearing in mind you should probably budget £3-500 for each day you do too, the sums soon add up. Don't do what 99% of people do on here - buy a car, strip it, "track ready" it with thousands of pounds of mods and then never see a track !