plunge into
US /plʌndʒ ˈɪntuː/
UK /plʌndʒ ˈɪntuː/

1.
tuffarsi in, immergersi in
to suddenly start doing something or become involved in something, often without careful thought
:
•
He decided to plunge into the new business venture without hesitation.
Ha deciso di tuffarsi nella nuova impresa commerciale senza esitazione.
•
After graduation, she will plunge into a demanding career.
Dopo la laurea, si tufferà in una carriera impegnativa.