I just bought a Wacom Intuos Draw tablet and I set it to Mouse mode which enables you to move the screen cursor with a "pick up and slide" motion, similar to using a standard mouse. For me in particular, because I have big hands this is the perfect mode.
Using the PEN mode, meaning that if the pen is on the top-right on the tablet the cursor will be displayed on the top-right of my monitor it's not so great for my big hands.

I set it to Mouse mode and it's perfect, PS6 works great but I want to master Krita. I open Krita, still on mouse mode but when I open a new document it jumps on pen mode. I can't find any settings for this and I am kinda new to the program. I would appreciate so much if you could help me.

Thanks in advance.

Krita doesn't support mouse mode for tablets. We get asked for that about once every two, three years, but nobody has stepped up to implement it yet.

This, this makes me so sad. I find Krita magnificent.