Have you had anyone review your portfolio and resume?
From reading other posts here, the advice about the certificate is not to rely on that to demonstrate your skills, rather use it as a part of what you describe your learning process was. Demonstrate your skills with your portfolio.
I looked at your website. I don’t speak the language, but clicking around I found that many of the links did not work or linked to the same page. It seemed to lack a lot of info in the about, project, news sections etc. But that could also be me not knowing the language. But if there is anything you put out there that employers see or is part of your portfolio try to clean up bugs, ask for reviews to find bugs. The employer will see the bugs and that will hurt your chances of landing a job.
And like everyone says keep building projects because you will continue to o learn.