Your trouble is in two parts, language barrier and the learning per se. For the language barrier get yourself a dictionary aimed at the Torah like Dr. Jastrow’s or Rav Hirsch’s Etymological Dictionary of the Hebrew Bible and a basic diqduq book. If you use those two as you learn you’ll find that you need them less and less as time goes on.
For the learning itself, get Rabbi Bonchek’s books on Rashi. He has one for each chumash, each focusing on a different aspect of learning Rashi. Once you work your way through one cycle with them (you don’t need to read every page) you’ll have enough grounding to learn Rashi, RaMBaN and probably Ibn Ezra on your own.