Networking Newbie needs help

I want one vlan to be able to see devices in another VLAN.

I have created two vlans with ID 10 and 20.

VLAN 10 has Ports 1, 2, 3 and four assigned to it - all ports are tagged

VLAN 20 has port 1, 5.6,7 assigned to it - all ports are tagged.

Port 1 on my switch is attached to my fibre router.

Under port config I have assigned a PVID of 20. This port is connected to my PC and gets the correct ip address. example xxx.xxx.20.xx

However i am unable to access any devices from VLAN 10.

How do I set it up so that I can see devices from VLAN 10?

I have tried everything and cant get it to work and the internet has just confused me more.

Help with this will be so much appreciated.