You need experience in *something* to lead projects. The general rule of thumb is first become a specialist, then become a generalist.
A typical path is to work in some business or technical domain until you gain enough experience to lead some activities yourself. From there you might either assist a PM on more involved projects which involve your specialty along with others.
That experience may help you move into an entry level dedicated PM job role, and/or provide enough experience to qualify to take the cert exam. Saving Changes...
Take a foundational course in project management (non-certification), gain some experience either in your current role or by volunteering, and look to enter the PM job family through either a project analyst/coordinator role or a junior PM role.