I am DMing Icewind right now and the Icewind set has been amazing for that. We are moving to Strixhaven once we are done with one of the players DMing for the first time. I know you can make all the sound sets, but that be a lot for new DM to learn on top of DMing, learning FGU.
We’re in the exact same boat hahaha
In the short term maybe this other thread may help you out.
Long term what Syrinscape makes is all top-notch hopefully they can help out.