How I process software product ideas: from an idea to a plan (+a Notion template)

Starting work on side projects seemed overwhelming since there were so many unknowns that lead to procrastinating and jumping between other project ideas.

Since then I found a process that works for me and documented it here:
https://medium.com/@shkliarau/processing-software-product-ideas-from-an-idea-to-a-plan-notion-template-1db379323c9

How do you usually kick off your project ideas?