Hi, welcome to the club.
For track days the normal recommendations are
Brakes: brembo HC's with Ferodo ds2500's and braided lines with some decent fluid.
Suspension: solid tops mounts - ktec, ast, there's a group buy on some other ones which I forget their name or Mark fish which are pricey. Some decent coilovers, or Eibach Sportlines with a rear arb.
Spare set of wheels with track tyres - Toyo r888's or Yokohama a048's seem to be the favorites.
But saying all of that the rs Clios are good round a track standard. Just get out there and enjoy the car then start the modding to what you want which I what I did.
Hope this helps