You can’t be ghosted on training server, the only way to be ghosted is by exceeding the speed limit(greater than 250KIAS under 10000 feet) and receiving 6 violations, after the sixth violation, a system ghost will be issued.
expert
Expert ATC and moderators can ghost if you are disrupting the traffic flow or not following instructions.
I have no doubt if you read the #tutorials section up, you will do absolutely fine.
See this post by our ATC community manager, Tyler.