Access Home Network Remotely Having Recently Purchased a VPN

I am hoping someone can help answer a query I have having just purchased Torguard from a recent deal (probably simple questions but first time with a VPN from a provider).

I have an AC66U router that is running Merlin's firmware and at the moment I have not set up Torguard. I plan to set up Torguard to run at the router so that all traffic goes via the VPN.

Right now my router is setup as an OpenVPN server and I have an OpenVPN client installed on my Nexus 5 to allow me to connect in to my network and access my NAS and other bits and pieces at home. I also allow for a couple of family members to access remotely via Openvpn as well to be able to grab family photos at times. This works well and there are no access issues.

I have installed the Torguard app on my Nexus 5 and setup a tunnel to various servers around the world and that works well.

What I am trying to understand is the following:

1. Once I have a tunnel set up to Torguard I cannot then have a second VPN connection established to my home network to access how I have done to date. How do I get access to my network using Openvpn when I already have a tunnel flowing through Torguard - Is this even possible? If it isn't then how do I ensure the most secure connection to my home network?

2. Once I setup my router to have all traffic flowing through Torguard how does that impact point 1 (if it impacts at all)?

3. When I have the router setup to flow all traffic through Torguard how do I change the Torguard server so that I can P2P if required (not often as most things I require are on Usenet).

Any pointers from the gurus out there would be welcomed.

Thanks