[Uwe]

I am unsure of whether you are asking for a holistic overview of all regulations which you need to comply with, or from a pilot qualification one. You haven’t mentioned what grade of certificate you hold for WSC (Sport Pilot, Private Pilot).

So I am going to take a stab with the simple one – the pilot one.
-You will need a flight review with a WSC instructor- 14 CFR 61.56. This is a great time to ask your instructor about any other requirements regarding aircraft or operational requirements.
– After getting your flight review, you will need to comply with recent experience requirements if you want to carry passengers – 14 CFR 61.57.
– Is your address up to date with the FAA? If not, you need to do this before exercising the privileges of your certificate – 14 CFR 61.60
– If you have a Sport Pilot certificate, you need to have either a valid medical certificate or a U.S. driver’s license, or meet Basic Med requirements – 14 CFR 61.303
– on a continuing basis, you will need to log your flight time and take-offs and landings to ensure that you meet the recent experience requirements for carrying passengers – 14 CFR 61.51.

OK- that’s the limit of the free legal advice with regulatory citation, but that should get you well on your way. Don’t forget there are a lot of applicable requirements in 14 CFR Part 91. It may be worthwhile to go over this with an instructor during your ground training if you you need some guidance. Good luck.