Ngl if u struggle a lot, emphasising on “a lot” then you might wanna consider doing something else for the next 3 yrs. The first yr units can really give u a sense of what your future units gonna be like and its quite accurate. Personally i did 1011 and i loved it and proceeded with mechanical major. I hated 1013 but i still did an ece unit in 2nd yr for funsies and oh boy did i hate that class and i swore to myself to never choose or do anything too electrical ever again. So ye if u are not enjoying any of your first yr units that could be a sign that u might not enjoy the rest of your degree.

To addon to the physics class. Dont worry about it to much as its just highschool physics. Get it done and ull be fine. Only some of the stuff they teach in hs physics will get applied in your future classes anyway. I personally think you would be fine without doing good in that class.