Hi @Roxria1_3 ,
How lovely that you’re offering drawing classes! Since the pandemic began there has been such a rush to return to art and practice, so I’m sure you’ll find plenty of people wanting to invest time in learning to draw - I know I do!
I understand what it is you’re looking for, and there are plenty of booking apps in our app store such as Sesami or Hydrow mentioned by @Ehsan_Khakbaz However, I would join @CST in recommending BookThatApp which seems to suit your needs. I’d always recommend having a proper look at the website of the app and maybe checking in with the developers directly if possible.
If you were thinking of running your classes as a complete course, as opposed to a casual drop-in/out model, then we do have tips on selling courses on Shopify.
I hope that helps!