No I dont think you can take out a student loan for racing cause its strictly signed for your schooling but the best way to look for a sponsor is to look at the bigger business such as rockstar, redbull, and monster those are the main or common sponsors that allow people to send in their sponor videos. The best way to get in the paying aspect is just start from block one. Go to gokart racing school, and usually after that you kinda have to buy a gokart and they go from 2,000 plus in cost but after you establish yourself into that and win some races the F1 teams will see intrest in you and they might just ask you to join their team and you sign a contract and thats kinda how you start thats how many racers get their start in F1 racing
work hard and believe