April Kurzurlaub (2Wochen)?

In two weeks you could easily visit both countries. You have more than enough time. I had made an organized tour through Albania with all the highlights. That was a week. Kosovo is still significantly smaller.

Kosovo is still very original and not discovered by tourism. The Batllava Lake offers a beautiful opportunity to relax and bathe in almost untouched nature https://www.kosovo-urlaub.de/batllava-see.html

In Albania there are beautiful swimming possibilities with sandy beaches by the sea. In contrast to other Balkan countries on the Adriatic, tourism is still within the limits, but it becomes much more every year.