Hi!
I'm also an international applicant and still waiting to hear back from all programs that I applied to. So far, I've just been doing and trying a lot of hobbies - sewing, crocheting, making videos, cooking, baking, gardening. Since you mention you want to improve your English and academic research, maybe you can start a blog and write about biomedical science. It'll improve both your writing skills and integrating information (which is important in research). Good luck!