You seem to be more focused on simplicity instead of security. What you are using now with your Raven Core wallet is the equivalent of a hot wallet. If your computer gets infected with a crypto-stealing malware, you could lose your RVN coins. That's the disadvantage of your choice of preferring the simpler path. But if you took the more secure path and did what was suggested to you in the thread, a malware couldn't steal your coins because it needs physical confirmation from your hardware wallet to broadcast the transaction.
Make up your own mind which path seems better.
Not focused on simplicity, but rather security. Im concerned about having 2 entry points to my coins. If I have to run a regular wallet, then it's possible to be compromised while syncing since it has to stay online for a long time to get all the blocks downloaded. All my core wallets take over an hour to sync. During that time the wallet is open, it's vulnerable. The whole idea of the Trezor is to keep it locked in cold storage until you need to send coin. So, now if I run a separate wallet then my coins are exposed even without the Trezor.
I see there is no choice however, so im wondering if there is a guide or instructions for how to link the Trezor to my RavenCore wallet. Not sure what linking it to my existing wallet is good for exactly though, since you can still access the coins through the wallet even without the Trezor.