Welcome to the forum chap.
Lots of helpful and knowledgable people here, just make sure you use the search functionality or you'll have Mork on your ass!
If I were you:
1. A decent set of tyres all round. Goodyear F1's are a popular choice and my favourites. I'm currently on P Zero Nero's all round, the new Assimetrico tyre is very good I think. I'm loving my new set!
2. 15 or 17 mm hubcentric spacers on the back.
3. Brembo elliptical grooved discs and Ferodo DS2500 pads for the front from Badger 5 here on the forum (OEM discs and pads on the rear are fine). Oh and Motul RBF600 brake fluid is top stuff, stick with it, I'll swear by it.
4. Forge recirculating blow-off valve.
5. ECU remap. Lots of choice here. Revo, P-Torque, Custom are all good choices, everyone has their favourite. Test drive a car if you can is my recommendation to see if you prefer a progressive map or a kick up the behind type map.
6. Uprated antiroll bars, again several choices. Have a search. These make a great imrpovement.
7. Suspension, again several choices. Seat Sport kit is a good starting point.
The list is endless. Everyone here has different opinions. Many run similar set-ups. A bit like Pringles, once you pop you can't stop...
Happy driving.