SLIGHT TREMOR ON HAND FINGERS. Pls!

Hello doctor, I'm 33 years old male. I was a complete fitness freak practicing martial arts and weightlifting every day. After corona, my life completely went sedentary and I'm unable to hit gym properly due to frequent lockdowns. Bcos of this, there is no proper physical exercise for my body and moreover I have to sit in front of computer for 10 hours as I work in a software company too. Especially I spend a lot of time in typing as I am a programmer. Coming to the point, I'm having slight tremor(or slight shivering ) in both the hands and fingers. Could this be a problem of over stressed work on fingers bcos of typing or my sedentary life or is it a  problem of weak nervous system or any other issues. Which doctor should I consult for this and what test do I have to take to find out the root cause of this and get a complete cure from it. Kindly suggest pls