Well I know its not what your looking for, but go to amxmodx.org and check out the wiki, check out some tutorials, and best of all check out some simple plugins (plugins that do simple things like restart). After that try making a plugin and just post for help in this section with your code.
A suggestion is to look into th efollowing functions to help start out
client_cmd
set_task
server_cmd
set_user_armor
set_user_health
get_user_name
client_print
server_print