Ingrown hairs, razors bumps and dark spot prevention on bikini line?

Ever since I’ve been shaving I’ve been getting ingrown hairs, razors bumps which eventually leaves dark marks and scars on my bikini line. I want to get a wax but 40+ for a wax is so much for me when I can save money and get a razor. I know people who shave their bikini line and have perfect skin down there. While me on the other hand. has dark spots all around with bumps. I shave with razor cream or conditioner like people say and still don’t get good results. I shave with a 2 blade razors still get razors bumps. I shave with a 4 blade razor that has soothing cream around the perimeter still get razor bumps. When I use nair it burns & I still get razor bumps but not as much as shaving but I feel like nair makes my skin down there darker😐. I’ve been shaving since middle school and I’m in college and still haven’t been able shave without any razor bumps or ingrown hairs. Also I shave in the direction of my hair and don’t try to do many passes and still get razor bumps. Can someone recommend anything please and thank you.

Side note can you get razor bumps from waxing too?

I just want to feel confident in my own body. ( I used to wear shorts that are bathing suits so my bumps and scars won’t show but I don’t want to do it anymore)

Another side note 😂 with my old SO I never felt completely comfortable with him naked cuz of my razor scars. He didn’t seem to mind but I couldn’t help but mind them😐

I know this is a lot but I hope someone takes the time to have read this far and leave some advice for me. I would greatly appreciate it❤️ thanks in advance