Can't mount NFS Datastore

Hello All,
Wanted to say that I’ve succeeded with creating an NFS datastore by the steps I saw here :

But, it looks like it’s not the official way…

Anyway, still, I can’t run any VM. Any VM I’m creating is in “PENDING” state forever.
No matter if I’m choosing it to be in the default system datastore [that for some unknown reason it’s showing 0 GB…], or if I’m using the NFS system datastore

Can you please assist ? we want to explore Open Nebla for our company but can’t make it start