That text you get in console tells you to enable debug. If you can't even do that much yourself, then you gonna have hard time finishing this mod.
About bugs:
amxx code is case sensitive, so if you define function as ShowHud(id), then to call it with set_task you need to use "ShowHud", not "showhud".
Saving doesn't work because you have no idea what you are doing. You use different keys and different delimiters in saving and loading.