Doubt classes
Book a one-to-one slot, describe the doubt when you book, and the teacher comes prepared.

No teachers are taking doubt classes yet.
Doubt classes are for the topic that has stopped you twice. They are not a substitute for the course.
Teachers publish the times they are free. Book one and it is held for you alone — nobody else can take it.
A session works best when you arrive with the exact question that beat you, not a whole chapter.
Free the slot from your bookings page and it goes back on the board for someone else.
Write the question out in full
Half of understanding a problem is stating it precisely.
Bring your attempt, including the wrong one
Where your working went astray is the most useful thing a teacher can see.
Note which step you stopped following
“I do not understand it” is much harder to help with than “I lost it at line three”.
Have paper ready
You will want to work through a second example while it is still fresh.