For me it more like a philosophical question. When I first read your question and answered I got the impression that you are not ready yet. @David pointed out that there is a difference between being ready and being eligible. For me, being ready is a higher state of mind than being eligible, and for an unknown reason I had ready in my mind not eligible.
I'm pretty sure there is a site - see @Mark's answer - which provides you the minimum requirements for starting the certification process. Based on your details you may have the necessary experience to start, so you seem to be eligible. However I don't know whether it is enough to get the certificate. It is like schrodinger's cat: you won't know until to go there and start the process. I'm pretty sure that these processes cost a lot of money and more importantly take a lot of your time. So check whether you are ready - dedicate enough - to carry through.