It's never a bad thing to have an extra language! I'm a French tutor and do a French degree and my best advice is spend time on vocab - if you can get through 1500 words you'd find higher reading fairly easy. If you can get through 700 that'll make you super confident for foundation. It sounds like a lot, but if you think about how many words you already know (le, la, les and so on) then it sounds a lot less! Otherwise, make a list of tenses to go through, and for each just write out in a way you understand how to form each tense and then write out some practice sentences (I run, I ran, I will run etc) and little by little you'll get better.
Good luck!