take a stab at
Give it a go
To take a stab at something is to attempt it, especially without much confidence or expertise: I've never fixed a carburetor, but I'll take a stab at it.
The phrase suggests a quick, possibly rough effort rather than a careful or skilled one.
You might take a stab at guessing an answer, solving a problem, or trying something new.
try
Make an effort
tackle · hazard · endeavor · undertake · have a go · give it a shot · wing it · approximate · speculate · hypothesize
volunteer
Unpaid willing participant
go first · break the ice · pioneer · spearhead · be proactive · risk it · bold move