Hi mate, welcome to the fold.
I, like you, joined only a few weeks ago but what an experience it is. I’m genuinely sorry to hear about your dad. I’m sure he would have loved you to have an awesome car like the Gti
Love the look of your car – candy white is, of course, the fastest colour! I hope the stealers make a good job of the sill strips – eventually. The thought of any spanner monkey near my paintwork with a knife makes me

though
As for the first detail; I don’t think a light hand polish – like AutoGlym SRP will do any harm. Clay
can give good results, I have used it on my other cars,
but unless you keep the area well lubed, there is risk of lightly marring the surface of the paint. Equally effective instead to remove the tiny fall out specks on the paint (very noticeable on white) is something like 'Iron X' or 'Purple Rain'. Simply spray, wait, then rinse. There are pleanty of tar removal products on the market that are also spray on, wash off.
I’d thoroughly recommend removing and properly waxing the wheels as soon as possible to give them the best start in life. Chemical Guys Wheel Seal is good, but Collinite 476 is my personal favourite wax. SOOOOOOO durable and the beading is extreme. Use it on the wheels and car body too, it’s great and the dirt doesn't stand a chance.
Check out cleanyourcar.co.uk or autobrite.co.uk
Keep us posted. I'll be watching with interest. Enjoy the process and remember, if there arn't daily updates and hundreds of pics upon delivery, we will take your toy away from you until you behave properly.
Enjoy.
Alex.