im beginner in photoshop i like this design anyone know any courses or YouTube channels doing

That's a definitely a case of jumping in at the deep end, but that's a good way to pick things up quickly.  Try YouTube witf 'How to illustrate in Photoshop'.  Do you have a tablet?  Are you using Windows or Mac?

What I suggest you do is jump right in, and ask specific questions when you get stuck.  We love responding to those threads.