I made a Hazbin Hotel x Reader Scenario book so please check it out.

Also sorry if you already know how to do some of these, if you can already play the guitar or draw then just imagine that you learned it from them.

Marinette:

How to design clothes. You saw her designing clothes so you asked her how she does it so she taught you how to come up with designs then draw them and make them.

Ladybug:

She taught you how to use her yoyo. Sometimes when you two are relaxing you will play with her yoo and fail to play with it so she taught she should teach you how to swing it. She laughed whenever you almost dropped it or failed to swing it. Eventually she took it back and said you should practice with a normal yoyo first before you accidently break hers.

Adrien:

He taught you how to model and told you some beauty tips. He finds you very beautiful but he can see sometimes your insecure so he thought giving you some tips will help. He just taught you how to model for fun.

Chat Noir:

He taught you some fight moves for if he ever isn't nearby while you get attacked you can defend yourself. He would tease you when you tried a move and failed. Both had a lot of fun while he taught you the moves.

Alya:

She taught you how to start a blog and how to take good pictures of Ladybug and Chat Noir in action without them being blurry. So she likes to work with you on her blog so she can share her passion for the blog and Ladybug with you.

Nino:

He taught you how to DJ. It was after a party while he was talking to his friend and he noticed how you kept eyeing the DJ equiptment. So he walked over and asked if you would like to give it a try. Of course you said yes. So he taught you the simple basic things about being a DJ.

Chloe:

She taught you how to dress. She found your clothing style stupid and ugly so she taught you how to dress. She even threw out all your clothes and bought you new expensive clothes. You would have been very mad at that but the new clothes were actually way better and cooler.

Nathaniel:

Of course he taught you how to draw. He would teach you how to draw small cute things. He liked watching your concentrated face. He hanged all the drawings up on his wall afterwards. When he feels down he will look at them to cheer up since on one you wrote "I love you~". He found it cheesy at the moment but now he likes that you wrote it because it reminds him that you truly love him.

Luka:

He taught you how to play the guitar of course. He loved showing you how to do it then watch you copy his movements. When you finally learned how to play the song, he liked to sit aside you and listen to you playing it. He never got bored of you playing on his guitar with a cute concentrated face.