It just seems to me that when folk decide to "get fit" the first thing they do is decide they are going to go running. And it's fucking shite, and they last a week or something and then bin the whole notion.
It IS great way to get fit and you WILL lose weight doing it. It's just boring. I'd much rather do something properly competitive. But that's maybe just me. I know we are all wired differently. There are quite a few ways to skin a cat anyway when it comes to fitness.
Just find something you actually enjoy doing and do that. When you start to get fitter you can look at other stuff to add to the repertoire anyway.
BTW, that chin up bar was the best thing I ever got.