How to get rank on Minecraft server?

You should probably go on that server's website. If not, ask a moderator where you can donate for ranks.

It'll be down to the specific server and whatever its Admins use to measure ranks.
Only they can tell you the answer to your question.

First you can build something that Staff members will like. If the server have plot world then it's even easier to make a building that you want because you have
Gamemode 1/creative.
If you are playing on hub server then you can make hub spawn because the hub spawn are always easy made and quickly.
If the server is not hub then you make something else, anything you want.
HUB-spawn from where you can got to other maps on server Survival Pvp Creative…