Transportation services are very poor in the Sorrento/ AC area. The area will be very crowded in May, and the infrastructure is poor. The roads are always congested, and the regional train service is gritty. The SITA buses are packed , SRO, and often have long lines for the next bus.
Many folks pay for private car services, but even these are sitting on the congested roads.
The area is a victim of its Instagram success.
This is very late to be booking lodging.
Good luck and I hope you have a great family vacation.
https://community.ricksteves.com/travel-forum/italy/lodging-for-rome-sorrento-3-adults-3-kids-boys
I see you have a similar post from yesterday.
Get a guide book, review the posts under Italy here, and read the posted Trip Reports. Join the FB groups for the area, and watch u- tube videos. You really need to research this area, quickly, as many folks book lodging 6-8 months out . Best wishes .