I would read An Introduction to Statistical Learning (note a new edition is coming soon!! though don't take this as a reason to put it off - fundamental maths don't change). It is a very approachable, fantastic book for a newcomer. Really really made the difference for me.
Also I would take some coursera courses like the incredibly approachable Introduction to Reinforcement Learning, and, of course, the GOAT course.
Context: I came into ML mostly from the outside (psychology; we get a pretty anemic stats education though it does include linear algebra/calc).