1. Comment button on the side, buddy. 2. Preferably don't ask direct people to look at your app, you are allowed to post a link on your profile and in your signature but that's it.

http://www.skyblock.net/categories/applications.81/
Click this link and the server you want to apply for. Then create a thread and fill out the format. Good luck on your application.

Well the fact that you don't know how suggests you should wait till you become familiar with the forums before you apply. Although, you apply by clicking the 'Forums' tab, scrolling down to 'Applications' and then click the desired server. Don't forget to follow the template.