"need something to work with on the go or sketching while watching tv."

Well, "while watching TV" implies that you're at home with your computer to which you could connect the tablet while "on the go" implies that you're away. It's not clear what you want. Is it a tablet that attaches to a computer or phone, or is it a standalone device that doesn't require a connection to anything else to use? Do you have an android phone. If so, which model? Do you have a portable computer to which you could attach the tablet? If so, what brand and model?

If you want something to use on the go or in the field, you should get a tablet or a laptop with a touch screen. A pen display requires being plugged into a computer of some kind, so it isn't as portable. I follow this person for his reviews on tech for creatives, he's got a lot of good info on what's out there and whether it's worth the price: https://www.brad.site/