Welcome to textfugu! If your ability with the English language is any indication as to how you will do with Japanese, you are going to do great. as for the sounds ら, る, ろ, りゃ, りゅ, and りょ, all I can say is practice. As a non native speaker, most of us will probably never get it exactly right. Just do you best, and I’m sure whoever you’re speaking to will be able to understand you. Don’t focus on this so much that you neglect other parts of your studies. Good Luck!