If you are writing about the progress he has made over a period of time, I would say the following. Ali has kept his head as he has faced the difficult task of learning English. He has improved his skill. or Ali has coped extremely well with the difficult challenge of learning English and he has improved his skill. Hope this is helpful

No it's not. Is there a certain phrase that you want to use? I'd probably say "Ali finds learning English difficult and seeks to improve his skills."

There are elements that are correct, but the meaning does not make it through. Something like: Ali keeps his head even with the difficulties of learning English and he continues to improve his skills. might work better, although some more detail of the skills Ali is improving might be needed. His language skills, or other types of skills?