Actually, I had toruble with arithmetic. Algebra made everything come clear for me. So I'm good with algebra, though I've long forgotten linear equations and quadratic equations.
Feel free to PM if you need help.
Mostly you have to get over feeling intimidated by it. You're going to be a better learner at 53 than you were in high school, believe it or not. So if the teens can do it, you can, too.