Woodworking/Carpentry. As much as I like writing code and working in Product, it'd be nice to work on something tangible. It's so much easier to give someone a physical product that (for the most part) is 'done' when it's handed over, and there's also the knowledge base that remains mostly intact and isn't continuously iterated like it does in programming.
It's cool watching someone I knew at uni build something that's useful for so many people, especially seeing him pop up on Hacker News from time to time!
Maybe start by looking at a small problem/time sink you're currently facing and build something around that? For example, I wrote a small script in Python to automatically scrape jobs in the past 24 hours when I was applying for a new role (It return the Company, Job Name, and Job Link).
I usually just pick a very small problem that I have and start building around that. For example, right now I spent too much time reading HN/Reddit and not enough time studying for an exam coming up, so I'm thinking about making a chrome extension that prompts me to answer a random question from a bank every few minutes otherwise it'll lock me out of whatever I'm reading.
Picking a simple stack (e.g Browser Extensions are underrated imo) also helps with building something small and quick.
Someone who I get a lot of inspiration from is https://tinyprojects.dev/. I've been reading his blog for quite a while and it's definitely kicked my brain into gear with small projects.