You can do those things, but be aware that when you book with tickets, its considered a package. Room only and a package come with different deposit requirements and different cancellation policies. If you book room only and add tickets making it a package, you may have to pay additional money for a deposit (a minimum $200 deposit is required) and you'd be subject to the package cancellation policy which is generally 30 days prior (I say generally because its temporarily changed in light of the pandemic).
In "normal" times, I'd suggest booking room only and buying discount tickets through a place like
Undercover Tourist. But given everything that's happened, a benefit of a package booking is that you can cancel by the cancellation date and receive a refund for the whole thing, and you aren't stuck with tickets that you may not be able to use the value of for a while.