The problem with doing creative work alongside technology is the endless pipeline of new products to pick from every single day.
If you don’t want to use Arduino, you can choose from probably 100 different types of boards to prototype with. In the world of music there are oodles and oodles of midi controllers, and in visual arts you can take your pick of fancy brushes, pencils and canvasses.
So how do you know when enough is enough?
I will tell you right now that you already have enough stuff to get started. Take what you have and push it to the limits where you can’t possibly move forward without a certain, specific tool.
Otherwise, you will spend all your time shopping for new products and not really making anything.
If you are this type of person, I’m sorry to burst your bubble but that game is over. Get to work.