It's kind of hard to rate your ness considering your opponent (atleast from these two videos) is not very experienced.
Things I noticed that you did wrong:
Edgeguarding against ness with the bair is a mistake. I saw you do it atleast 5 times and you either got outranged by the fair or missed completely.
You made alot of reckless attacks as far as standing right infront of your friend and doing the bat or pk fire.
You only sweetspotted one out of the three times that I saw you do a recovery that required it.
You rolled right into your friend a few times, leaving yourself volunerable.
You did mostly back throws even at low percentages which makes it difficult to lead to combos.
Things you did ok:
It looked like you got about half of your l cancels which was pretty good. It seemed like you were JC almost all of your grab attempts, you are pretty good at wave dashing and it seems like you djc fairly well.
If you are looking for a number, personally I would give you a 6.5 out of 10. If you were playing against someone that put up more of a fight it would be easier to see your mistakes, but it might be a better way show off your skills too.