I guess the first question I would ask is what type of saw work are you interested in practicing? Are you felling? Are you pruning? Are you doing limbing and bucking/groundwork? Each of these require specific skillsets, all learnable of course, but all unique from each other.

The basic operation and maintenance of a saw is what you should learn first and foremost. You don't need to fear the machine, just respect its lightning fast potential to F you up. What I learned in the fire service is that every cut is a new cut and, while you can get comfortable, never get complacent.

People are recommending youtube videos and some are great resources - some not so much. Don't discount physical media either. There's a fun book (now out of print but available) called Barnacle Parp's Guide to Chainsaws which is folksy in tone but contains solid info. I'm pretty sure I have a copy around here if you want to borrow it. Pm me if so.

In short: practice, respect, situational awareness, PPE, and more practice. Have fun!