When I began to play I combed through YouTube to patch together fundamentals that I thought would be important to learning the tenor sax. This app provides a collection of hundreds of expert teaching videos of the fundamentals that I was looking for into groups, fingering, embouchure, long note drills, etc...
Combine daily practice of 20 minutes, with these drills and formal teaching then you have a winning combination. I'm trying not to overthink and over-complicate this instrument and to just have fun.. There is so much to learn so don't be overwhelmed.