These chord progressions are terrific for jamming over, or with friends, or for that matter, if you're looking for ideas for a new song you want to write, they're here as well!
They key to understanding chord progressions is found in understanding the number system for guitar theory. My Unlocking I IV V course digs into exactly this topic, and it will teach you how to build your own chord progressions from the scales, using numbers and intervals.
Understanding major and minor is an important part of understanding chord progressions, because depending on whether a chord progression is major or minor will greatly affect the sound of it to your ears. Unlocking I IV V will give you the tools you need to identify they key of any chord progression and whether it is major or minor.