How much skill before modifying a stock car?

I have a stock m440i. I have been to a few autocross events and one track day.

I would like to get better at the sport and would like to ask about a preferred next step. I suspect my opinions are:

1. A track day school
2. An alignment and some camber plates.
3. Some kind of data recording system so I can get and more feedback on my runs and hopefully make changes for the next run.

I am getting a band of wear on the outside edge of all the tires, and the front does slip before the rear. This made me think an alignment could help.

If it matters, I have 340 tread wear summer tires. These are new this season, I would like to use these up before replacing them.