VPN Always On question

I have an RB951G-2HND running OS 6.45.2. I am having an issue with a VPN I would like to set up. I tried this about a year ago, and ended up getting busy and shelved the project, but I would like to get it going.

Here is the setup:
Hardware

  • RB951 as my main router at my home. I am using the internal wifi for my house.
  • Samsung Note 8
  • Samsung Tab-A tablet
  • Samsung Galaxy S7

Software

  • Currently I have deleted all of the VPN settings in the router. I could not remember exactly where I was, and I figured it would be better to start over at a clean slate then try to re-engineer what I had done.
  • Would like to set the “Always On” VPN setting in the Samsung devices to always be on, even at home.
  • Original VPN settings were an L2TP/IPSec PSK, but I am open to any protocol (hence the reason to just start with a clean slate).

Here were my issues during my first attempt:
At home:

  • With the “Always On” VPN turned off in the devices, the devices functioned as needed, all is good.
  • With the “Always On” VPN turned ON in the devices, the devices could not get out of the network to the internet.

Away from home:

  • Worked as it should. No issues

The Tab-A belongs to my son. I don’t want him to have to remember to turn on the VPN, or me have to turn on the VPN before he leaves the house. I would like to just leave the VPN on all the time.

Thank you in advance for your help.