As a Project Manager of an organization, you would primarily be responsible for planning, organizing, and directing the completion of specific projects for an organization keeping the time and resources constraints in check.
You would drive each phase of the "project lifecycle" that includes the following phases:
For a clearer idea take a look at this blog https://www.edureka.co/blog/project-manager-roles-and-responsibilities/.
You will have to communicate with the team members, stakeholders and identify the issues and resolve them while keeping track of the budget, time, and other resources so that it gets approved by the client/stakeholders thus building trust.
There's a youtube playlist that you can refer to in case you want to learn PMP and get certified.
Best of Luck!