Yes good advice above, I certainly did that for over a year, worked my way through all the free Webinar sessions, mostly by Johannes Vloothuis on ImproveMyPaintings.com which turned out to often be 3 to 4 hours (officially 2 hours) every Saturday and Sunday evening for quite a time, along with others, occasionally all day on a Sunday with real time actual classes if you can stick at it!
I will try anything that is free!
But once you have done all your research, I would limit your time on here otherwise you will get nothing done!
Good luck, pace yourself and above all have fun.
David