Considering Getting the Garmin Tacx Neo 2T... what else do I need?

Got my fancy new bike (2023 Trek Domane SL 5 Gen 4)... and in an effort to get daily use out of it, I am deciding to get a trainer.

I have the (1) Garmin Tacx Neo 2T, (2) a large workout mat, and (3) a Shimano 105 R7101 Cassette in my shopping cart... is there anything else I would need? I have never used a trainer before...

Thanks!