Start a session by naming one outcome: understand a concept, complete an exercise or review a mistake. Keep the target small enough that you can recognise when it is done.
Read or watch one lesson, close the material and explain the main idea in your own words. Then practise without copying every step. If you get stuck, note the exact point rather than restarting the whole subject.
End with a short review: what you learned, what still needs work and the next task. A repeatable routine is more useful than an ambitious schedule you cannot maintain.