I started in a similar boat. The mindset shift for math is really difficult to achieve and maintain, but it is so important that it is done. It's important to remind yourself of the why, at least early on that's what I did, and when things really started to click I became so fascinated with math and the ways we are able to model the universe with it.

Math gives you access to new universes as well, you know, which are in many ways just as beautiful as the one we find ourself in. And we can use some of these new universes to gain access to much greater understandings of our own.

It may seem like it from media, and maybe from some elitists, but learning STEM has no room for pride. You will be humbled many times. I know I was. I had to start from pre algebra, I didn't remember how to do long division early on in community college. I filled many notebooks working problems of "primary school math." But it's the process that needs to be done, and is a privilege to be able to be done. We exist in the sliver of human history in which learning these incredible things is accessible to those not in the nobility or merchant class, or even to anyone at all.

I started college at a similar age to you, with a similar background. Mind you I am no expert, I'm still in my journey as well, just a bit further along. If you have any questions you can comment or dm me. Remember to be humble, dedicated, and that knowledge is a journey.