I have toured Croatia already and would like an islands visit.
So far i have not found a way to see just the islands .
Any recommendations?
Fly into and out of Split. That makes a good base to access several islands, and you can spend however many days you wish at each one. No need for a car, but you can rent scooters on any island. I went to Brac and Korcula on my trip (which was not focused exclusively on islands, but was a mix of Croatian cities and also parts of Bosnia). Obviously, the ferry schedules/frequencies really depend on the season.
I do not understand the question.
Assuming you mean the southern islands, the ideal scenario is to fly into Dubrovnik and out of Split, or vice versa. Then make your way using the two primary boat operators: Jadrolinija and Krilo. Google will bring up the schedules. Note a bus also connects Dubrovnik and Korcula.
So, where do you want to go and how much time do you have to do it?