Random Question

I have been trying to do some extra research in my free time to learn about the differences between:
Covenant theology vs. dispensational theology
And then:
The different types of dispensational theology:
premillennial, progressive, traditional, etc

I was wondering if anyone had a simple, easy, or straight-forward resource about any of these topics or if they simply have an explanation that they just want to share with me! That would be great!
I have not had enough time to delve too much into this research, so for now I just would like a starting point.

Thanks
Alex