Pompeii, Sorrento area - hotel and sightseeing suggestions

https://community.ricksteves.com/travel-forum/italy/amalfi-coast-for-5-days-where-to-set-base-from

https://community.ricksteves.com/travel-forum/italy/amalfi-coast-for-7-nights-itinerary-help

https://community.ricksteves.com/travel-forum/italy/herculaneum-and-pompeii-questions

https://community.ricksteves.com/travel-forum/italy/pompeii-and-vesuvius-69e8366c-1e75-4a14-a0bc-0677269492d1

https://community.ricksteves.com/travel-forum/italy/one-week-on-the-amalfi-coast

https://community.ricksteves.com/travel-forum/italy/amalfi-coast-day-trip

It's impossible to say during Covid, but this is an almost year-round destination (especially for the UK) that used to book up six months in advance. Particularly if you have a low budget, you need to book early, and prepare a list of at least six choices. We booked late enough that we had to go what Rick calls a "Worthwhile Splurge", at the Ambasciatori in Sorrento.

I'd say the opposite of your question: Pompeii (except for the ancient site, Pompeii Scavi) is not worth visiting, Sorrento probably is. But it has only one, petroleum scented by the adjacent marinas, beach. The fancy cliffside hotels (like the Ambasciatori) have an elevator to a lovely private wooden boardwark gulf-bathing area, if you like that sort of thing. Most people stay in Sorrento for the excellent daytripping connections.

Welcome!
Sorrento is a lovely town, great restaurants, beautiful views, very walkable, fun shopping. Also the transportation hub for the area.
No need for a car in town or to get to Pompeii. Car would be more of a headache than a help.
The local Circumvesuvina train is only a few euros- takes about 30 min to Pompeii Scavi.

https://www.positano.com/en/naples-to-sorrento-train-schedule?timetable_route=sorrento_napoli

We loved our stay at Hotel Grand de la Ville.
Killer view, beautifully appointed/furnished rooms and the best bkft we've ever had
https://www.delavillesorrento.com

Another often mentioned here is Antiche Mura
https://hotelantichemura.com

Both within easy walking distance to train and town center.

Is it easy to drive from Sorrento to Pompeii or are we better off
taking the train?

How are you trying to come to Sorrento in the first place? From where in Italy? That said, I'd say no, don't drive.

Is Sorrento where we want to stay or should we stay further up the
coast closer to Pompeii?

It may depend on what you're looking to do when NOT at Pompeii but I'd say no, there's no reason to stay further up the coast.

Is Sorrento worth visiting?

For us, yes, it absolutely was but you don't say what you're interested in doing/seeing on your trip so only you can answer that question. Do some reading up on Sorrento before you go.

https://www.sorrentoinsider.com

Editing to add: where are you going after Sorrento or that general area?

Another vote for Hotel Grande de La Ville in Sorrento. As mentioned up thread it has the best breakfast! The view is spectacular and comfortable rooms. “Is Sorrento worth visiting?” Absolutely! Enjoy your planning.