Yes, you are considered self-employed for the 1099-MISC income. Check out some of these Help articles:
How do I report income from self-employment?
What self-employed expenses can I deduct?
Where do I enter my self-employment business expenses?
Meanwhile, filing an extension is a very good idea. Here is how to do that. If you think you will owe, you will need to make a payment by the end of 07/15/20 as well. Here are some payment options.