I_am_10_squirrels , 8 hours ago

I studied engineering after failing high-school algebra, so I was also pretty behind.

Khan Academy is a great resource for everything from elementary algebra to calculus and linear algebra, all of which you’ll use.

Symbolab is great for figuring out tough homework problems.

YouTube is good for certain topics, and some may be able to explain how something applies to comp Sci.

Once you’re in, use office hours. Some places have free peer tutoring. Everywhere has tutors you can pay for.