Are there a set of rules and open source base micromouse that I can take and create a competition in my country?
Please take a look at the repos at:
https://github.com/ukmars/ukmarsbot <- this mouse was shown in the Veritasium video. It is exceptionally low cost and easy to assemble, source parts for and there is enough code in the repo to make good progress.
I hope you do this!