It's not that there is no easy way to do this. The fact that there is no way at all. All tor traffics will exit from the exit nodes (that's why they are named that way).

From: https://privacy.net/what-is-tor/

Tor over VPN:

With Tor over VPN, you connect to the VPN first, then use the Tor browser. It’s simple and effective.

Your traffic will go through the VPN server before it gets to the Tor entry node. This means that the VPN server can only see that you’re connected to Tor and can’t see where your traffic is going. Going back to your ISP, it only sees that you’re connected to a VPN server, and nothing beyond that. This means your ISP can’t see that you’re connected to a Tor entry node.

VPN over Tor:

This setup is a little more complex and doesn’t really offer additional anonymity. In this case, your traffic goes through Tor first. Your ISP can still see you’re connected to the Tor network, the Tor entry node can see your real IP address, and you still need to trust you VPN as it can see where your traffic is going.

One issue VPN over Tor does alleviate is the Tor exit node being able to see which site you’re visiting. Instead, it simply sees that you are connecting to a VPN server. One downside to this is that your VPN login information could be viewed by the Tor exit node operator. Another benefit of this setup is that websites which normally block Tor traffic will be unblocked.