Start by accepting the fact that you are on level 1 and have to master each chapter one by one. If you are willing to work hard, nothing can stop you for too long.
For Physics:
Start by watching video lectures or readjng notes majorly focusing on the concepts of topics. Ask yourself the hows, whens, whys of the concept. If you are able to answer those, you are doing it right. I would personally suggest joining a batch offline or online to maintain the momentum. *Alakh Pandey* popularly known as Physicswallah, will help you A LOT.
Then hop onto the numericals, starting with basics and solving pyqs multiple times. Make a small diary for formulas. It will help you in last minute revision.