First off you have to be a mod to apply for admin , there's no other way,

First you have to make a new post in which you post it In the server application section

You have to follow the template , it's like a Q&A

If your applying for Deathrun
Make your title [DR]davidbrit's application
Click here for dr template
If your applying for darkrp
Make your tittle [SSRP Moderator]davidbrits application
Click here for darkpr template
Yup
Written on a tablet