For what is next after the CSM, you should look at scrumalliance.org since they are the certifying body for that certification. If you want to know others, look at the left side of this page and click on CERTIFICATION to see what scrum.org has available. You can also use your preferred search engine and search for "scrum certifications".
As @Steve said, Scrum Master and Project Manager are two different jobs. If you want to know more about Project Manager progression, again go to your favorite search engine and search for "project management".
After you have done that and have specific questions related to being a Scrum professional, come back and I'm sure that many of us will be happy to provide our opinions.
What are you goals? Getting Certifications, Learning, Growing as a Scrum Master or some other role? We have PSM II and PSM III if certifications. If wanting to keep learning, start following the Scrum Master Learning Path, its free.