there is no training that can replicate racing... even long-time pros say this

if you've never raced (and doing one race leaves you in this category) then you probably won't know enough about racing to focus on the right stuff.
Do enough group rides to get decent enough where you won't kill anyone else with your handling... and to work on the engine... race!

I don't have a car either- I ride my bike 15-20 miles to races... call it a good warm-up.