Common expressions: have a look, have a rest, get ready, get lost
Have + a/an + noun; Get + adjective/past participle
Don't have + noun; Don't get + adjective
Did you have a...? Did you get...?
💡 British: have a shower/bath. American: take a shower/bath.
✓Let me have a look at that.
✗Let me do a look at that.
Have a look is a fixed expression.
✓I need to get ready for work.
✗I need to become ready for work.
Get + adjective for change of state.
✓They got married last year.
✗They became married last year.
Get married is the standard expression.