Agree started off following painless 360 myself, "rotor riot" has some good stuff but lots of entertainment leaning rather than education but it is in there. "Joshua Bardwell" JB to the community is great for beginners for his learning to fly and betaflight configurator videos, UAVfutures is another review channel to add to the ones already mentioned where they do under $100 builds and ready to fly or bind and fly model reviews along with frames and other components reviews. For technical reviews of props and motor performance and options KebabFPV is my go to channel.