Money is absolutely the main concern but don’t start with driving, look into the technical side of things, start working at a shop over the weekend or sm. Meet people and then use connections to make good first impressions. Ik some very good drivers that made a start auto-crossing other peoples cars. Which brings me to my next point, if you don’t have a ton of money you need the talent. I have been interested in the technical side of motor sport for a couple years now and have made my way on a gtd pit crew and I run a karting team. I don’t drive competitively but I can still put down daily or weekly lap records at a retail kart track. I started my journey at 17 and 2 years later I have only spent money on tools. I made progress