What do I struggle with?

I think that there are two thing that are difficult to me:  my reading rate and  grammar. I still don't know how to improve my reading, because I can't read fast and understand everything. The second thing I have to improve is my grammar because I think I forgot many grammar rules. I studied English many years ago, and I never practiced. Now I have to remember many things. I think that if I improve my grammar and vocabulary, then I could read faster.