What to do next?

Sure! You have plenty of information in PKP’s documentation hub:

Let me say that you will need some technical knowledge to do the installation, and once is done, you well need to upgrade it periodically (ie: once a year).

If you don’t have this knowledge, you can learn taking specialized courses about LAMP administration or hire the service to PKP PS or any other OJS specialized organization.

Cheers,
m.