Re: Is this home training routine sufficient?
Sounds like you're just starting out getting back into shape so it doesn't seem bad. Have you been trained before? Because if not then drop everything and get to a gym, you'll only engrain bad habits.
If you want to mix it up, you can try different ab workouts (russian twists, kick-ups, planks, etc.), mountain-climbers, sprints, work a slip rope, get some small weights for strength and endurance shoulder exercises, do toe-touches, etc. A medicine ball is also good to have around to compliment ab workouts and do slams, catch it and toss it above your head, etc.