You can join MILRP simply by accepting the invite to the Discord page above. There is no application, meaning that you can get going as soon as the server next starts up.

A division is a group of people that fight together, either independently from others or along side others. They often follow a theme and share the same uniform, and can be hardcore or humorous. These are the smallest forms of military groups tied with PMC divisions.

First collect a group of people to be your members. Ask around if people would be interested in joining, advertise your division in the respective channel, etc. Once you have formed a community, you can create a ticket in the Divisional Management server, and request to become officialised.