This is one reason why it's helpful to learn bottom-up when possible as opposed to diving straight into the deep end and trying to fill in missing knowledge as you go.
With bottom up I always feel lost because I don't know what it's useful for, the relationships to other pieces of knowledge, etc.
However, the learning itself has to occur bottom-up. Especially in math. Math is a skill hierarchy, and if you cannot execute a lower-level skill consistently and accurately, you will not be able to build more advanced skills on top of it.
I wrote about this recently here if you're interested: https://www.justinmath.com/how-to-learn-machine-learning-top...
We don't give first graders an overview of differential equations and their applications when we start teaching them addition and subtraction.