foot in the door, get one's

get a/(one's) foot in the door

To have a chance to do something that could lead to further opportunities. The phrase is often used to refer to employment. An internship might not sound very interesting, but it's a great way to get your foot in the door at this company.
See also: door, foot, get
Farlex Dictionary of Idioms.

foot in the door, get one's

Achieve an initial stage; succeed with a first step. For example, I think I could do well in an interview once I get my foot in the door with an appointment. This term alludes to the door-to-door salesperson or canvasser who blocks the door with one foot so it cannot be closed.
See also: foot, get
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • a foot in the door
  • a leg in the door
  • a toe in the door
  • foot in the door
  • get a foot in the door
  • get a/(one's) foot in the door
  • get foot in the door
  • get/have a/your foot in the door
  • have a foot in the door
  • have a/(one's) foot in the door