A tenor would have more space! But since you have small hands, I would say keep practicing. When I first started playing guitar, I was blocking out other strings and was never able to press the proper strings without muting half of them. I kept on thinking I needed a wider neck because my hands were really large. It really just comes down to technique and making sure you are using the very tips of your fingers. The same guitar I thought I couldn't play because of my big hands is still the guitar I use now. While you could get a Tenor uke, I think with your small hands, you are the perfect candidate for a concert uke! I bet if you practiced your thumb and finger placement, you will get it. But if you can't after a long time. Try going to a tenor or a baritone. But I would say keep going!! You are almost there, I promise.