I think understanding Indian people is quite easy, I only struggle occasionally because they naturally speak fast, but as a stutterer that maybe will apply less to you. For context I’m British and I stammer. Semi related, I lived in Germany and Sweden for a while. People said I was quite easy to understand, which I think is because I naturally have to speak more slowly than others. I have a northern accent so that surprised me. I also think at least in the UK accents are so diverse (local and foreign) that it doesn’t bother people at least in a professional setting. I have noticed a lot of non-native speakers saying they wish they sounded more British but in reality I don’t know any Brits who care! Most of us only speak one language!