The problem is that I have already set up my Trezor wallet, though it has no coins in it as of yet. So am I too late to sweep my funds into my hardware wallet or can it still be done? I cannot see a way of doing this.
No just use eelectrum to transfer your funds to the trezor wallet.
The fees arte high now... but I would move my coins as fast as possible, as it is safer.
Create a new wallet with trezor and click receive to see the address and transfer