[header] How to do a front tuck [title] Have some basic moves down first. [step] The first would be a somersault; preferably, you'll be able to do several in a row. Next, and probably the most useful to learn, would be a front handspring. 
Both the somersault and handspring get you used to being upside down in the air. Practice both until you're totally comfortable before moving on to the front tuck.