Some kind of vlan (noob)

I have RB-750 and would like to configure it this way (i don’t even know what to ask google):
ETH 1 - access to internet, intranet, printers, attached storage devices and services
ETH 2 - PC 1, my computer, now it gets i.e. dhcp 10.0.12.100/24
ETH 3,4,5 - computers 192.168.1.0/24

I would like that PC 1 sees intranet, internet and 192.168.1.0/24 network,
computers on ETH ports 3, 4, and 5 should see only PC 1,
and intranet and computers on port 3, 4, and 5 should not see each other.

Thanks and best regards,
Peter