@Monty like NPF said, Tabata style is the way to go. Even 4-5 minutes (if you truly give your max effort) will do plenty. If you’re looking to train for a half marathon you might want to try other methods but for general fitness/conditioning, that should be plenty.
I like skipping rope too. Only thing, for me at least, is I have tight calves and some chronic Achilles tendinitis on my left ankle so too much skipping and that starts to flare up. Just something to consider.