I want to develop a programming language. Can anyone suggest me what should/can I do?

Answer 1

I don't have experience with it yet, but I'd like to mention Xtext. Posted a question about it recently, where you can find a wiki link:
https://www.sololearn.com/Discuss/250417/?ref=app

Answer 2

do a lot of research and know exactly what you are doing. You risk to invest a lot of resources in reinventing the wheel.