I will first:
1. Check the dealership to see all the cars available
2. Check the used car dealership to see all cars for that day/week
3. Check Brighton antiques to see all the rare cars for that day/week
4. Test out the free cars given for the Digital Anniversary edition
5: See how much the CLK-LM, F1 GTR Longtail, Ferrari F50, Carrera GT and 911-GT1 Costs, they are all probably out of my budget even with the $1.5 million bonus but atleast it will give me a goal to work towards.
6: Do license test up to the S class or until they become too difficult.
7: Purchase the following cars using my bonus money: Toyota Supra MKIV, Mazda RX-7 FD3S, Nissan Skyline R32 and R33, Nissan 300ZX Z32, Porsche 993 and Lamborghini Diablo GT, see if they all have widebody options and try to get the Diablo GT as close to the GTR version as possible to make it competitive against GR.3/GR.2, hopefully the PP and GR ratings are interchangeable as i'm sure the supercars can be upgraded enough to compete with atleast GR.3
8: Do races and play the game as regular.
I do not plan on doing any online races but I may check out the open lobbies as I had a blast playing cruise lobbies back on PS3 with GT5 and GT6.