Thank you for your response! I've done it right now as you said:
I have 3 Nim Commands to start (NimDocOf, NimReferences and NimTypeOf). If i start them - every command works! But what must i do, if i wanna see after 3 characters typing, which posibilities i have to choose from? For example if i have 3 variables like so: * this * thisAndThat * thisthis If i type "thi" i excpet a popup where i can choose one of the three variables... And wha says `:LspInfo` that there are zero clients attached to the buffer? perhaps this is a level to heavy for me :(