Wow never thought I would see a fellow Malayali here haha. Well, here are a few tips, 1) First try talking to a mirror and you might feel more confident 2) Gather the words you want to speak in your mind 3) And most of all have confidence in yourself. I could only come up with these tips in my mind right now haha. These tips work for me and hope these are helpful for you.

I think once you don't care about mistakes and how people judge your language skills, you will gain the confidence over time by speaking more often, then you speak better and more fluent.