There are no steps as such. If your dev environment is running then you can reproduce and fix the issue and raise the PR to pgAdmin master. The pgAdmin team will review it and raise comments or code change requests if needed.
Hi my name is Dajer and I will love to help the pgAdmin project. I have several years of python and flask experience and multiple years of vueJS (Similar to Reach). I have created my fork and I’m ready to work. What are the steps if I want to work on issue and stuff