Congratulations on passing the CISSP! Unfortunately, no, you cannot self-endorse - but you can have (ISC)² itself endorse you. Just provide your work experience (CV/resume) on your certification application and the team will review it.
An (ISC)2 qualified professional must endorse and digitally sign the application. If you don't know somebody with the CISSP, (ISC)2 can serve as your endorser, and you would present them with the relevant information, and they would verify and endorse your credentials as an endorser.