Welcome to the forums!! Any question that you feel obligated to ask, ask away! We have world class speedcubers on this website that will gladly take time to help you out!
Just practice. Do lots of solves-timed or untimed. The more familiar you get with the cube, the faster you will get. I went from 30-20 sec in about 2 months and I did not learn anything new other than a new F Perm alg that was just easier to finger trick. For 5x5, same thing. I went from about 7 min to 3 in just 2 weeks and that came through getting more familiar with the cube, getting faster tps, and practice, practice, practice! The only way you can get faster at solving is to do solves. Good luck on your journey!