plunge into

US /plʌndʒ ˈɪntuː/
UK /plʌndʒ ˈɪntuː/
"plunge into" picture
1.

se plonger dans, se lancer dans

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.
Il a décidé de se plonger dans la nouvelle entreprise sans hésitation.
After graduation, she will plunge into a demanding career.
Après l'obtention de son diplôme, elle se plongera dans une carrière exigeante.