You might have an easier time with the Internet Encyclopedia of Philosophy.

https://iep.utm.edu/

SEP is written at a very high level - and while that's great if you have a background in or previous knowledge of concepts, IEP can be easier to grasp for those at the undergrad level or who are just starting their philosophical education.

I once took a few hours to read their article on Lacan. I also took extensive notes. It helped me a great deal.