Freelancer Questions

I am a freelance graphic designer, and own an Etsy shop. 

 

I have a couple questions.

 

1. Are these two kinds of businesses okay to group under one LLC? Neither are super profitable yet, but I do have an LLC.

 

2. What happens with taxes if my business expenses are far more than my business profit? 

 

3. Let's just say, if my business made less than $500 or even $1000 for the whole year, how do taxes work? Especially if you have business expenses.