

I love my Samsung Galaxy Tab S9+. I bought one after using my Note 10+ for years and becoming hooked on the S Pen. The default program for taking notes on Samsung devices is literally called Notes, I’ve used it for years and it has been a boon to digitizing my all handwritten notes and drawings (I also use ibisPaint). The Samsung S Pen is a comfortable size, feels natural to use and very responsive. The S9+ is a little more pricey, but it has a 1440p AMOLED screen and is just gorgeous to look at and use. Highly recommended.
I wrote all of this and then looked up Obsidian to see what kind of software it is. You can use it for sure, though the S9+ might be overkill if you don’t need the drawing/writing capabilities. I have used my mechanical Bluetooth keyboard to it and that works great, but I tend to use Microsoft SwiftKey with the S Pen when I don’t have the luxury of sitting down to type. HTH
You sound like a real life Peter Griffin.