To acquire mastery over any subject, don't act like a rocket - act like your nails. Let me explain.
We don't see our nails growing - every day, they look almost exactly the same as the previous day. But in a week or two, you start noticing the growth and have to clip them.
That is the magic of consistent progress.
On the other hand, a rocket takes off in a matter of seconds, and then flames out.
Learning something every day for an hour is far better than doing a 6-hour study session and then not showing up for the next 6 months - that is the rocket approach.
For once, it is ok to be slow. Move an inch every day, but move.