how much hard is to be admin on mc server

is hard to be admin on server i played on diffrent mc servers and i dont know how much is hard to be admin of mc server

Not that difficult really, most servers require you to have played for a certain amount of time. Most servers also likely have staff applications, just submit one.

It is quite easy if you open a server yourself. And you can make yourself a admin.

Being a Minecraft admin is not always easy. You have to deal with other people's problems and sometimes do technical tasks. Did this myself for a few years. You have to know yourself whether you like it

It's actually fairly simple. A few things can be tricky if you want to have modifications and the like, but any search engine will turn up plenty of how-tos to help along the way. It can be a lot of fun if you don't let it become too much work!