Its OK but...
Croatia, is more ideal for sailing than kayaking, I have done both.
Sailing because of thhe many long islands that give shelter in rough conditions along the coast. For kayaking there are few places to land on these islnds, and where you can in summer will be crowded. The coast line is mostly lined with sharp rocks and what few beaches there are they stony. But the harbours are nice and food + wine excellent.
My suggestion is Greece or Turkey.
Cheers
James