Subforum installation of nextcloud with collabora

Hi,

I am not experienced in this at all but a friend of ours is and will be installing us nextcloud at our request with collabora (so we may work together) we got a 4gb I believe it is the requirement for collabora.

My question is this… he wants to do different installations of things on different domains
since ours will be nextcloud.ourdomain.com what would you install to run it. basically what is for you the best configuration so that we may have several things going on and no we won’t have more than 10 users on nexcloud per turn.

My question is related with speed and also other processes on the other subdomains and what configuration is the most reliable and fast

Thank you in advance for all the advise you can give