/sci/ - Science & Math

/agdg/ here
I'm learning basic math to make statistics and damage formulas for my game.
What I heard is that I need to learn the subject: formulas and graphs.
Right now I'm learning from mathisfun's algebra section starting from top to bottom (basics of algebra to functions and sequences), as well as peeking into what functions are like (whether that be on mathisfun or another site that I found via google).

The lessons are easy to understand and basic, but my problem is that I feel lost at the same time. Like I'm memorizing all of this shit, but I wouldn't know what to apply them to when I make my game.
I tried reading "rpgs and math formulas" and I recognized the basic concepts that were taught, but I didn't know what the fuck was going on; I asked questions to myself like "why was this equation used?" as I read. https://www.redblobgames.com/articles/probability/damage-rolls.html

What should I do? Should I just keep taking notes and learn algebra?
Are there any sites out there that'll help a brainlet like me learn math and applying them into games I'll make?