Sharing with you that I had a very similar goal/challenge in the early years of my college journey. I think the most important thing to call out here is the stated goal..."want higher marks in Physics...". To be clear, you could have replaced the word physics with any other subject...but sticking with Physics for now sharing three things I did to get higher marks 1)paid closer attention in class. Physics was the least exciting of my first year classes so remaining focused was a bit of a challenge for me but I had to do it to get better marks. 2)identified things that I didn't understand sooner rather than later. The best time to get help and raise those marks is when there is still time in the semester to do so. 3)got myself on a "repeat cycle" with teaching assistants and study partners. Both serve a good role in terms of keeping pace with what you are learning and how you are retaining what you are learning.
Hope you find this guidance helpful. Best of luck to you!