Moving forward from B1 to B2 (Full time English job)

Hello All

Those who have a full time work in English. How did you move forward after B1>?

I am doing my B2.1 right now and the level of vocabulary needed is mind blowing. I am working 10 hours a day and along with that my own food / beuracracy / health and so on.

What helped you move forward to speaking fluently and be comfortable with B2 level?
My weakest part is speaking and my goal is to be able to speak German at work.

I work from home so even less interaction with other German people.