Ok, so here is the website that I looked at before I wrote my abstracts! https://owl.english.purdue.edu/owl/resource/656/1/ One of the things that helped me a lot was that I have read a lot of abstracts for articles in my independent study in anatomy this semester. So I recommend finding abstracts on stuff that you have already read (maybe to an essay we read last year?) to become more familiar with how abstracts are supposed to work and their language.
And then here is kind of the process of how wrote my abstracts and what I would have done differently: The first two I just kind of outlined the purpose, methods, conclusion, and scope of the criticisms as I read and then wrote the abstracts. This worked well with the my first criticism, which was shorter and less complicated, but didn't work as well with my second criticism, which was longer and more complicated. While reading my last criticism, I wrote down the pieces that the author addressed as they came up and then connected them together as I read. This made it much easier to decipher the purpose, methods, conclusion, and scope of the abstract. When I was finished I ended up having an outline for my abstract all done and ready to go, which made writing my last abstract much easier. So I recommend doing what that because even though my third criticism was my longest and most complicated, it was so much easier to write an abstract for with this process. I wish I would have thought of this method earlier and used it for my first two criticisms.