I really want my PSTV to work well and I can't seem to find any instructions online in regard to port forwarding or anything else that will improve my connection. I have my PS4 connected with a LAN cable and the PSTV will be used via WiFi. Any help or information would be appreciated.
As the PS TV works over Wifi, no port-forwarding is required to connect to the PS4. What you need to do is possibly connect the PS TV using ethernet to improve the connection. If you cannot connect the PS TV to Ethernet, try using a Wifi booster to increase the signal.
You can also try enabling "Direct Connection" for Remote Play on the PS4 and see if that makes a difference to your connection. The only port forwarding you may need to do is on the PS4, for certain online games.