dive in with both feet

and jump in with both feet

Fig. to become completely involved with something quickly, especially something new. I had never done anything like this before, but I just jumped in with both feet and learned it in no time.

Common Names:

Name	Pronounced	Usage
Heino	HIE-no (German), HAY-no (Finnish)	German, Dutch, Danish, Finnish, Estonian
Aelianus	-	Ancient Roman
KÓRi	-	Ancient Scandinavian
Paraskeva	-	Bulgarian, Macedonian
Cassianus	-	Ancient Roman
Walton	WAWL-tən	English