So, your message is understood completely. However, the changes that are different to the previous teacher's corrections are the following: a pronoun is need in the 2nd sentence, because it is a new sentence entirely, and not a continuation of the first sentence. Homework is a singular/plural noun, and if you want to quantify it, one should say "do a couple homework assignments" or something similar. At 4, you should state "my home workout"; we typically use personal pronouns in English (i.e. "my head hurts"). We use "go back" and "come back" depending on the point of reference of where you are physically. Since you were away from home at driving class, it is better to use "go back home", because you aren't at your house. Keep studying - you're doing great!