Just go to track days.,the stock suspensions isnt terrible. Dont bother with anti roll bars for the track, roll is good for driver feedback. Get anti roll bars if you really want to do a lot of autocross.
Thr stock suspension is plenty good for learning on, and doesnt have too bad of habits. Suspension is pretty complicated and its easy to unknowingly downgrade your suspension. in any event if you do mod your suspension I would highly recommend you keep srock ride height unless you really do reasearch.
If you want to learn some basics (heavily focused on the damper aspect) check out the far north racing site.
http://farnorthracing.com/autocross_secrets.html