How should I start learning the maths needed for astronomy and physics?

I’ve always been weak at maths in school and never really enjoyed it. I think part of it was that I believed I was just bad at it, and maybe the teaching didn’t help either. I also probably didn’t have enough interest back then to really apply myself.

Years later, I’m now a software engineer, and I’ve become genuinely fascinated by astronomy. I want to understand how things work, observe the sky with a telescope, take readings, do research, and really go deep into the subject.

I want to approach this properly, and I think the best place to start is with maths, then physics, while also learning some basic astronomy alongside it. Given that I’m starting from a very weak maths background, what books would you recommend I get first for learning maths and astronomy in general?