Orbi as Primary with a second router as VPN?

Hi. My apologies in advance because I really am an accidental techie. This is not my forte, but no one else in this house wants to do it, so I've done some recent upgrades to our system - I'm really just a housefrau who likes to figure out a good puzzle.

We needed an Orbi for coverage as well. We also hate Comc*** with a passion and didn't want them selling our info and I wanted a VPN router once I read about them. So, I bought a new modem, Orbi router with one satellite, and a FlashRouter with DDWRT, and sat surrounded by a bunch of electronics one afternoon trying to figure out a plan. FlashRouters support was able to help. We hooked up the new Motorola cable modem to the Orbi and used the Orbi as our main Wifi Router. This is because when we use things like Netflix and Hulu on Apple TV, it is easier to connect to our Comcrap "spying on us" wifi; otherwise, with a VPN server it ends up being a PITA and I have to switch servers to one in the US if we're on a UK one, etc. We connected our VPN FlashRouter to a port on the Orbi Router.  They called this a double router set-up and it seems to work okay for us. (Honestly, I think the only problem for us is our Orbi satellite. It seems to have issues and I don't think anything is working off of it at all.) 

This way we have three networks showing up right now, our standard Comc*** one, then two VPN networks, one 2.4 and one 5.0 to choose from. We tend to keep the iPads connected to the VPN networks. The only pain is that we have two desktop iMacs in an office next to a laser printer. We had to choose a network for the printer. Whatever we print FROM has to be on the same network as said printer or nothing happens - took me a while to figure out what was going on there. Slightly annoying when you are moving from network to network sometimes, but I guess nothing is perfect.

Hope this helps. I could not find ANYTHING when I was looking this stuff up two months ago. Not many people with VPN routers yet...