A minimum to start with I think would be Feature Requests and Bug Reports.
I find issue templates to be a big time saver in the end. It can feel cumbersome at times but having to fill out sections makes for much better issues imo - in the case of bug reports I think it's really helpful to get into the habit of making a bug report as the first thing you do when you find a bug - it prompts you to think systematically (which sometimes helps you solve it in your head already) and the information is clearly laid out when you come back to or when someone else has a look.
A minimum to start with I think would be Feature Requests and Bug Reports.
I find issue templates to be a big time saver in the end. It can feel cumbersome at times but having to fill out sections makes for much better issues imo - in the case of bug reports I think it's really helpful to get into the habit of making a bug report as the first thing you do when you find a bug - it prompts you to think systematically (which sometimes helps you solve it in your head already) and the information is clearly laid out when you come back to or when someone else has a look.