Got a new job but I'm struggling with English

Hi folks, I've just started a new job, and I have to spend most of them coding and discussing it with other people. I'm not a native speaker, my English level is around B2/C1. Although it has been ok, I still struggle when I have to speak my mind or write an email to a client in front of everybody (so I can't use gpt). I know that if I have patience this experience will help me to improve my English, but it's hard to fail in front of my coworkers. I'm planning to go back to study English and I was evaluating the options, basically Lingoda, Babbel and Cambly. I'm thinking about having most group classes and a few one-on-one (though I didn't have great exp with those). I believe that a structured class might help. I'd like to do one 30/60 mins class per day, and some extra on the weekends, for 2 or 3 months. And for to accomplish this I think Lingoda or Babbel have the best prices. This job is very important to me, and I'd love to hear your opinion and other ideas on how I could tackle this situation.