I've told people before and I'll tell you.
https://www.amazon.com/dp/0553380168/?tag=pfamazon01-20 (both the book and the TV miniseries), by Carl Sagan is another classic layman physics intro, though it's getting a little dated by now. It's also geared to a slightly younger crowd, so if you're in the middle school to early High School range, that might be a good bet.
Other than that, take all the classes you can in physical science, mathematics and physics whenever you can. Also, good sci-fi authors can teach you a lot as well (or at least point you in the direction of questions to ask in the real world). Arthur C. Clark in particular was excellent at mixing real science in his fiction.
https://www.amazon.com/dp/B000P1TL04/?tag=pfamazon01-20, which again should be a couple bucks at any used book store worth the name.
Other than that, watch the Discovery Channel or the Science Channel, they have some good space/physics shows. Everything will help, you just have to start building a base of knowledge, and add the more complex stuff on as you learn more.
Also, I don't know how old you are (you seem fairly young), so I'll say: If you want it, don't give up. You know what separates someone who always wanted to a physicist but never made it, and someone who is a physicist? The decision to do it, no matter how hard it got. That's it. Trite, but true! :D