Have an opportunity to start something like a job.
"It's not a great position, but at least my foot is in the door."
"I need to find a way to get my foot in the door."
"I'm doing an internship for SK Telecom. It's an opportunity to get my foot in the door."
A: "Did you find a job yet?"
B: "No. I'm still looking."
A: "With the sagging economy, it's hard to find a job."
B: "Yeah. I'm even considering a lower position. At least I'll have my foot in the door."
Other Common Sentences
"I'm working in the mail room. But I'm hoping I can change positions now that I'm in the company."
"I hate my position, but it's the only way I could start in this company."