The key to learning Math in adult life, as I have found- setting aside 40-180 mintues every day to learn regularly.

It would be golden if you can create a study group that meets weekly. Just start a discord/Element room/Zulip/IRC chat and go from there.

I am learning Topology as an adult and learned Category Theory this way.

This truly works.

Setting aside time 4-5 days a week works. Make it a habit.