You need to delegate tasks, it's part of your job. Train the new hires, add them to your project and let them do the majority of the work. And you shouldn't work on weekends and holidays.
Another lesson hard learned was realizing it’s not my job to do everything like an IC. And especially not my job to personally fix all people problems. I’m merely just here to guide and coax along the right path. And give lots of specific feedback on what’s good and what’s not so good.
A hope maybe this helps the grandparent poster. Your post resonates heavily with where I was at a year or two ago. Being a manager ain’t easy. I’d argue much more so if you were a really strong IC.
I've known since university I'm bad at delegating things. Do I just have to learn by doing it?
Finally, what do you mean by IC? I'm pretty sure I'm not an integrated circuit, but I've never gotten the head X-ray to check for sure.
Another topic might be communicating the lack of bandwidth for the work. Maybe there’s scope creep or too much work on the plate and some needs to be dropped.
As far as learning delegation, yeah, that’s how I did it: trial and error. For me finding really competent people who I trust and who want opportunities to grow and take on new responsibilities has helped a lot as a kind of prerequisite.
And yeah sorry IC = Individual Contributor, i.e. not managing anyone.