The aliases and port forwarding I already explained in your previous post: Have we any OPNsense gurus out there? - #15 by iwalker
all the information in that original thread clearly explains how to configure it properly so that it works, including the VIP’s if you are not going to be using the public IP which is currently on the WAN port. I suggest re-reading all the info there.
The opnsense forums are your best bet for help if you are unable to get it working with the information that was provided so far.