Again I completely agree with consistency.
Your Kit sounds like my 2 brothers when I got them back in November and I found them a complete handful and that was after only having adults.
Newbies to ferrets are better off going to a rescue and getting a pair of adults IMO
1st you should have 2 this little guy needs to play and have fun, my boys love to wrestle each other and this little guy is missing out on the fun.
Never flick noses
I am not a fan of scruffing, one of the brothers Loki would bite hard and jump at you. We spent ages just simply saying a big NOOOOOOOOOOOOOO at him and put him on the floor. We did it 50 times plus during a play session and after time he stopped. He is still a little so and so every now and then but we keep it up!