There isnt a correct order.
Assuming your goal is to get a job as a sysadmin, my advice is this: look at jobs near where you want to work, and see if you cant find openings that look appealing to you, and see what these ask for or suggest is a plus. Maybe its Linux+, maybe its RHCSA. But whatever it is, maybe its better to try getting that first.
In the meantime, you dont need a cert to start applying places. If you have knowledge and experience, try to make it clear. Throw together a github or a blog to show your projects, and start sending resumes out. You might get lucky.