As someone who grew up in a small village in Egypt and studied my whole life in Arabic at public schools, and who is now doing a PhD in the U.S., I know how hard the transition can be after years of studying only in Arabic. It took me a long time to adapt, and it wasn't easy at all in the beginning. Over time things got better, and I now feel comfortable.
If I could give one piece of advice to anyone from a similar background, or still chasing big dreams, it is the one I wish someone had given me early: learn English well.
If you're where I once was, start learning English early. And if you're already learning but still struggling, I've been there. It is exhausting and takes real effort and sacrifice, but it is worth it, and one day you'll see it pay off.