To relax or feel secure about something.
easy does it
Relax; do something gently, lightly or carefully; slow down; calm down …
take it easy
To relax or rest.
lighten up
To make (something) or to become less serious and more cheerful or cas …
build on sand
To put something in an unstable position by failing to give it a secur …
child's play
Something particularly easy or simple.
cake walk
Something extremely easy.