Feeling Cold

Now (you can also say "Currently"), the weather is extremely cold. (new sentence) The temperature is very low and I really do not want to go out at all. Although I have to study english today, I feel exhausted, because my pronunciation is fairly wrong and I need to practice more.
I hope one_day I can speaking as like a native speaker, but it is will be very difficult to achieve. I feel very disappointed at the knowledge of my english. Perhaps, I have to attend a class to get more motivation. (new sentence) It will take a lot of money, (add a comma here) but i don't have any other choices.(don't forget the period at the end of your sentence here)

Where you say "I feel exhausted" Do you really mean "frustrated"?

Where you say "because my pronunciation is fairly wrong" You can also use the word "bad" instead of "wrong" It sounds better.

Where I highlighted "will be" that is the correct word to describe the future tense. "it is" describes something that's currently happening.

Good luck on your learning Alias. You'll get there slowly, but surely. ^_^