If you're hosting your own server you'll actually have to op yourself and then do /give. But, if you are using a hosting service such as mcprohosting, you'll have to log into the control panel and op yourself. and if i were you, I'd install essentials because it gives you such commands like /setspawn /spawn /i /warp and stuff like that! it also comes with the /kit command that you have to change some things in the configs to get those working properly. Happy minecrafting!