Another solution for this is a notebook with removable pages, you can scribble all you want and if you decide later you don’t need that page in this notebook you can take it out (toss it, store it, or reorganize to a different notebook) and add fresh paper as needed.

It’s also handy to be able to reorder pages if you’re bouncing between purposes, and gives you the option to have a mix of papers if sometimes you want lined and other times dot grid or blank.

I like these https://www.jetpens.com/Lihit-Lab-Pastello-Twist-Ring-Notebo...