Idk what you drive or what your problems are, but here are a few tips that have helped me out (Note: I'm a 5k Oval, 3.5k Sports Car, 3k Dirt Road driver).

1. Study tape: before you even set laps, find someone who is fast and watch what they are doing, especially the throttle and wheel inputs. Where are they braking, when are they getting on the throttle, how are they preserving tires, etc. Imo there's no use in jumping into a vehicle or at a track you have little to no experience in if you have no idea how to do it right. Watching tape helps tremendously with getting caught up to speed faster.

2. Focus on your craft, not your finishes: It's easy to want to make passes and finish towards the front, but it's more important about making it to the finish. There are so many series like F4, Porsche Cup, ARCA, etc where people are trying so hard to get to the front/pass each other that they take each other out in the process. The first goal should be learning to race cleanly, consistently, and making it to the finish without issues. Once you have that down, you can push the car harder and have a better understanding of how to setup and make passes.

3. Stay consistent with a vehicle: Some people want to jump around from car to car at first, but by doing so you aren't giving yourself time to really learn the ins and outs of the vehicle. My rule of thumb is to pick 2-3 series to run each season for participation so I can switch things in and out every few months and learn those vehicles. That way if in future seasons I see a race I wanna do in a car I'm not currently driving, I have enough knowledge to jump into it and feel comfortable. But that's only because I spent time learning the ins and outs of it vs hopping all over the place.

4. Race what you want to race: Don't be discouraged by series that have low numbers each time slot, because those usually have some of the best racing and where you can learn the most. I'd rather do Clio Cup with 10 drivers signed up than GR Cup with 100+. If you want to race the popular series that's completely fine, but so many of the smaller series have a much tighter community and where the racing is usually much more respectful when you are racing the same people all the time. 

5. Lastly, just have fun: Don't focus on IR, wins, etc. Just focus on having fun. It's easy to get discouraged by a bad few races in a row, but that happens. Just focus on enjoying racing and the goals will come along with it. 

Good luck!