Someone could make a review of my game ? I'm 10 Kyu

Teaching Reviews requests
#1
#2

Do you have specific questions? Could you explain why you resigned instead of playing the ko at N5?

You were winning the game, but M19 should have been played at L18.

#3

Well, I don’t know why I thought that even if I win the ko the group could live, I misread that, I would like some thoughts on the upper side in the begining, has a pattern in that situation ?

#4

@mark5000 posted some excellent comments. Black’s bad move at O16 saved white.

#5

Posting here because I forgot to post earlier.

#6

Thanks, man