I,m new to coding / Are there any apps that sell on Appstore

[Zigaboo72]

Hey there,

I am new to coding and have some ideas for an app that could complement Spotify. Here are my queries : 

1) Code to know - i'm particularly interested in accessing the spotify music inventory and having it displayed on the app ( i.e.. artiste name , song title , album title ....etc) . I am aware of you tube videos out there teaching one how to go about specifics ( i.e.. using Javascript , React , Node ...etc). 

2) Money making from the App ( using Spotify) - In the event i do create this "app"  , can it be sold on Appstore ? Or are there rights violations  etc ?? 

Thank you and look forward to hearing from you. 

Regards,

Ziga

IOS Iphone user.