Going back to the basics is still going forward.
A familiar topic can reveal a new question. Make room to revisit what you thought you knew.
Familiarity is a starting point
You may have encountered a term many times and still find it difficult to explain. That is a useful observation. Familiarity tells you that you have seen an idea; an explanation helps you discover how the pieces fit together.
Returning to an introductory lesson does not erase earlier work. You bring your newer questions with you, and those questions can make an old example worth reading again.
Choose one gap
Avoid restarting the entire subject every time something is unclear. Pick one term, one relationship or one step in a worked example. Write down the point where your explanation stops making sense.
Study that gap with a focused question. Draw it, try a different example or ask someone to explain the step another way. Keep track of what helped so you can use the same approach again.
Make your next step small
After revisiting the material, write a short explanation without the source in front of you. Mark what remains uncertain and choose a manageable next session. A clear next step is more useful than a long list you never begin.
Learning need not follow a perfectly straight line. Revisiting, asking and revising can all be part of building a more dependable understanding. Give that work a place in your plan.