I just finished sewing several masks to donate to the local school. 
That is very nice of you. Where exactly do you shop for all of your sewing supplies?
I just shop at my local Walmart. They have a large selection of fun fabrics.
Is it very hard to make your own homemade face mask? I usually just buy mine but they are disposable.
It is fussy, but not difficult. There is a lot of trimming thread ends, ironing, and trimming hems. 
that is very nice you do that for people. Do you have any general advice on how to make a mask the right way? I feel like i would mess it up
I use a template that I cut out of cardboard. That way, your mask is always the same size. It is also important to iron your hems. It keeps everything neat and easy to see.
very interesting, How old is your sewing machine? I recently read an article about sewing machines but it was a beginner guide to buying them from 2019. I feel like maybe buying one used is a better deal though.
I used an old Kenmore for years, but recently got a new basic, inexpensive model from Walmart. There is nothing fancy about it, and I love it! 
How exactly do you use a sewing machine? is it very hard? I know a sewing machine has a lot of parts!
The only thing that I find difficult is remembering how to thread it. I always have to follow the directions. As long as you follow the directions for your machine, it is relatively easy. Once everything is threaded, you just press on the pedal and sew.