Eh geez...the 2010-era, some-Cali-dood-with-a-channel-says-drawing-your-gun-if-it's-not-fer-shur-deadly-yet-is-"brandishing" ethos still lives in recesses of the internet...
1) Take less classes, practice more. -Been there, made that mistake.
2) One platform at a time. -Been there, made that mistake.
3) One style of shooting at a time. ?
4) Don't get caught up in technique arguments, focus on principles. - Agree.
5) Start shooting with competitive shooters earlier. -Agree
6) Start FOF as early as possible. -I did and I agree, though that is in a bit of contradiction to #3.