I want to keep this lowkey and not draw too much attention.

In a subtle or understated manner.
Let's keep this lowkey so no one finds out.
She prefers to celebrate her birthday lowkey.
He made a lowkey suggestion during the meeting.
lowkey vibe
lowkey celebration
lowkey style
subtle
understated
discreet
I prefer a lowkey celebration for my birthday.

Describing something that is not intended to attract attention or is understated.
She wore a lowkey outfit to the party.
His lowkey approach made everyone feel comfortable.
They had a lowkey dinner at home instead of going out.
lowkey vibe
lowkey style
lowkey event
subdued
unassuming
modest