Note that, as with most retail operations, as Apple Stores reopen, services, displays, and capacity are more limited than before. See Apple’s statement.
When possible, you should order new equipment or seek support online. For support, you can set up a call-back at an appointed time so that you don’t wait on hold. I have done this several times. If an in-store visit is required, either for a technician to work with the device or have it serviced or exchanged, it can be arranged during the call.
It appears that the ability to play with demo devices is currently restricted in order to limit the possibility of disease spread. So, I would advise taking advantage of online resources, both from Apple and other commercial sites, to narrow your choices for anything you may purchase. Once you have narrowed things down, take advantage of return and exchange policies to audition your first choice, and, if necessary, return it within the allowed time period (14 days for Apple).