Welcome to Planet Minecraft! ( •̀ ω •́ )✧
I guess you will find a lot of kind people here that can assist you with servers and command blocks.
In terms of servers and Command Blocks, it is a good idea to start with simple concepts, and, if you still have interest, go as deep as you want.
There are no limits. This is Minecraft. ( •̀ ω •́ )y