I would advise you to focus on business English. Take a look at different courses; Promova has an excellent one. I started my
english learning journey with this platform. The Promova course helps you master all the key aspects: correspondence, meetings, presentations, polite phrases. By the way, you can choose individual lessons with teachers who tailor the classes to your professional field. There are also group classes where you can hear how others speak, which helps you build your business speech without templates. More features of the platform are described on the main page, so be sure to check it out if you're interested.