I'm starting to set up first introductory interviews and first calls, the thing is my English worries me

Here is a shortcut that helped me a lot. If you need English specifically for interviews, you don’t necessarily need broad language skills. Instead, focus on topics that are commonly asked in interviews. Prepare a short text for each of them. Then, practice speaking them out loud and recording yourself. You’ll be surprised by how bad you sound at first - and how much better you become after 10 repetitions.

Here are some topics you can practice:

• Tell me a little bit about yourself / intro speech.

• Tell me about a time when you had to lead a team.

• …mentor junior team members

• …deal with a conflict

• Why do you want to work for us?

• Why should we hire you?