I always wanted to work in TV but it took me two years to get a foot in the door.

我一直想做电视工作，但花了两年才进了这个圈子。

《牛津词典》

The important thing is to get a foot in the door.

最重要的是得先入行。

youdao

For the past three years, I've been trying to get a foot in the door at my dream company, without success - until now.

过去三年里，我一直试图加入我非常心仪的公司，但却未能如愿。

youdao

Small firms have long struggled to get a foot in the door of big companies which have lengthy bureaucratic processes and specific vendor requirements.

WSJ: New Site Aims to Relieve Supplier Woes

To me, it sounds all too attractive for newspapers to deploy free or cheap journalists, and it's certainly an attractive opportunity for young student journalists to get a foot in the door.

BBC: Paper Tigers

To be sure, many churches haven't been immune to the effects of the recent recession, and even for those that are financially stable, entrepreneurs trying to get a foot in the door may find it difficult if they lack religious affiliations.

WSJ: Small Tech Firms Tap Into Churches