I started working out with calisthenics recently, and I want to workout my shoulders using only hand stand push-ups. Will that be enough to have good looking strong shoulders? Thanks.
No, it doesn't hit all three shoulder heads (assuming you mean the anterior, lateral and posterior deltoids.) Breakdown of handstand push-ups.
Mechanically I don't see how you can work all of the shoulder muscles unless you can encounter resistance coming from the wide range of angles the shoulder can direct force to. A gymnast routine on the rings would probably do it, but does that count as a single exercise?
You should be able to find a small repertoire of shoulder exercises that hit all the muscle heads and fit in with your calisthenics routine. I cannot speak to how visible the development would be.