12.9” version is not necessary but I find the bigger screen is much better for art
Buy iPad Pro 12.9”
Again, this specific model I don’t think is necessary but it’s what I use and love
Buy Apple Pencil (2nd Generation)
The paperlike screen protector I think is an essential part of digital art on the ipad. It can wear down the tip of your apple pencil if you're too rough with your line weights but it makes a huge difference with how your hand and pencil move togethe...