Admittedly I didn’t read this whole thread so I apologize if this has all been said but I just tought my wife to use a baitcaster and these tips helped her.
Obviously set it up for every lure you use.
Turn the brakes up.
Don’t to to cast it like you would a spinning rod. Start off with a smooth swooping motion. Don’t try to cast it a mile.
Feather the line with your thumb while it’s in the air.
Practice.