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.