The idea that you need to motivate yourself to do a thing you don't want to do is an idea that needs deeper investigation. I've caught myself trying to do that a bunch of times. Why the hell I think I need to do this thing in the first place?

I totally get things like I have a job and there's a task that needs to get done. But what about outside the job life?

Fitness is hard because there’s very little to zero immediate benefit particularly if you are out of shape. I also think for many things, particularly those related to lifestyles and behaviors, the goal is to do it often enough so that it becomes a habit. Most people probably don’t enjoy brushing their teeth, but we also don’t think much about it, we just do it. I feel the same way with running, I don’t think I enjoy it, certainly not all the time like in winter, but it became a morning routine that is easy to execute.