https://www.amazon.com/gp/product/B07FTC3D68/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1 Go for this (or similar) grip. Something that's actual ergonomic. The silicone sleeves don't do anything for me.

and: for protectors, this one is what I'm talking about. The price is worth it, as it's quality means the pencil tip won't wear, and it doesn't produce a rainbow effect. However, it's not intended to protect the iPad. https://paperlike.com