There's a tradeoff you're going to have to make a lot of the time: simplicity vs. precision.
Simplicity often lacks detail and nuance. That's why we build and do more complex things - to get more precise, specific outcomes.
Choose simplicity unless there's a good reason not to.
Complex systems have more of a damage of collapse. Add complexity carefully, and in a way where you can roll it back if the added-complexity doesn't add enough benefit.
If you look like at one of my time tracking sheets, you'll see a pretty complex thing. But it gradually, slowly grew into that. If you were starting from scratch, don't start with something complex. Start with something simple. Track 3 things max.
Consolidate as time passes. Cross out things that you no longer need to track, either because it's not relevant any more, it's automatically successful, or because tracking wasn't producing gain there.
I used to have a "Research" category and a "Learning" category on my time tracking. They're slightly different, but I combined them to "Research/learning" - I lose a little bit of fine grain detail, but gain simplicity. And simplicity is good.
Start with simple. Add slowly. Complexity is a huge tax and increases the chance of collapse. You should be getting a big gain if you're going more complex.