In a new language you’ll understand way more than you can say for a long time. That gap is normal, not stuck.

Recognising words and producing them are two different skills that develop at different speeds. Understanding is pattern matching with context helping you; speaking means retrieving the right word, in the right shape, fast enough to stay in a conversation. The first runs ahead of the second for everybody, which is why you can follow a film and still freeze ordering coffee.

Practise the slower half on purpose, out loud and badly. Say three sentences a day to somebody, or to yourself in the kitchen. Short and frequent beats long and rare, because the thing you are training is retrieval speed.