If understanding Physics and Mathematics is your choice then you have the right teacher. I have to my credit over a dozen professors and scientists among my past students who claim their success entirely to the sound basics they got from my classes. That includes a Ph.D. holder from the University of Limerick, Ireland who is a Ph.D. in applied Mathematics but joined my online tuition classes when she continuously failed in Math during her 9th grade with getting single digit marks. She continued her online tuition till completing her A-Level with an A+ grade and a campus selection an integrated Post Graduation for Applied mathematics and Artificial Intelligence in Bristol. There are a few other credentials as well. In essence, it is not necessary that you need to be good in Mathematics or physics to excel. You only need to be interested in learning. Leave the rest to me. You won't regret it.