Peanut Butter, while I appreciate that people need a place to start, and most racers never have enough money, doesn't matter whether you are racing 4 cylinders or Super Lates
The brutal reality is that I would try to make my car as safe as possible.
A decent cage kit for your car is $385 from CSC. That one has front hoops which I would highly recommend. A less complex cage kit is available for $231. Plus welding, if you don't have the skill or equipment.
You should buy the best helmet and firesuit you can afford. Even a SFI 3.2/A5 suit is only rated for 9 seconds in a fire. My suit cost a lot of money but it is well worth it. You don't want to ever have to deal with burn injuries.
I do not know the rules for the class, but a fuel cell and a proper aluminum racing seat are awful good ideas too.
Just friendly recommendations for you and others who are just starting out.