"Eu" can almost always be omitted; it's only required when you're either comparing it to another pronoun (Você quer essa bolsa, mas eu quero esta. You want that bag, but I want this one) or simply if you want to place more emphasis on the subject (Eu quero essa bolsa. I want that bag).
You're welcome! There were a few (normal) errors in there, but I understood you perfectly :)
P.S. Last this year, your sentence will be something closer to: "Muito obrigado pela ajuda! Quero (saber) falar português no/até ao fim deste ano!"
Good luck with your studies :)