I spent 8 days in Salerno last year but was mainly there for the other attractions - Naples, Pompeii, Paestum, Herculaneum - but did one day on the AC because it was there and it seemed to obvious not to visit. My honest assessment is that it is amazing from the sea but offers little else that I am interested in. We took the ferry from Salerno to Positano - it stopped in Amalfi along the way - and the coastline is amazing. I wanted to go as far as Positano because everyone says the best and most remote coastline is between Amalfi and Positano.
We wandered Positano and say the big sites but even at the very end of season I found much of it to be too crowded. I cannot imagine how it must be during the height if season. Amalfi is bigger and a little better - there are still boat supply and fruit and veg stores surviving but I also counted 4 gelato places in a row at one point. We had lunch and headed back with a "Well we've seen it and now we never have to go back feeling".
You can see the glimmer of what must have been an amazing place before it was "discovered" by the English poets. Up near the paper factory in Amalfi you can see the rugged hillside and feel some of that clinging to hills feel. And maybe that still exists in the smaller towns down the coast but the big name places were not my cup of tea. If you want to spend more time Capri has some of the same feel but there is a whole island and has much more to explore and discover away from the tight city streets of the AC.
You can catch the ferries or buses to the AC from Salerno and you can visit Capri as well although the ferry is almost 2 hours since it is much further than Sorrento where it is only about 30 minutes.
You might check out the Path of Lemons if you're interested in walking trails.
https://www.onegirlwholeworld.com/europe/path-of-lemons-amalfi-coast/
https://www.travelamalficoast.it/en/the-path-of-lemons-between-stunning-views-and-tradition
This will give you exposure to smaller towns and less touristed areas which I would strongly recommend.
I agree with others here - Sorrento is not so much a destination unless you're basing yourself there for Capri and Amalfi coast.
My $.02, have a great trip,
=Tod