Tuck handstands are possibly the hardest way to get into a handstand, but the most important as they don't allow for bad alignment. They're also a great way to work your core. I've added spoken instructions over the top of the video, and the second video is things to try and avoid. Make sure you're nice and warm before starting, hips, hamstrings, wrists and shoulders need to ready to work!
From your down dog, walk your feet in until your shoulders are above your wrists. Pour the weight into your hands and start drawing in your lower ribs, creating a hollow shape. From this shape, start small with some tiny little bunny hops, just experimenting with feeling the weight in your hands and how your hips start to move upwards. Once you're more confident with supporting your weight and being upside down try and make the hop a little bigger and reach your hips up inline with your shoulders. Make sure the shins stay horizontal and as tucked in as possible. Try lowering down and landing like a ninja, super slow and light!
It's important to try and keep your shoulders above your wrists as much as possible, if you let them come back then the bunny hop you need to get hips over shoulders is huge!
Make sure you're not using your backbend to balance. Keep the ribs tucked and keep extending out of the shoulders. You will probably find it easier to balance like this, but try and think about alignment over balance time.
Give your wrists some love, wriggle them around and give your forearms a little massage, wrists are not used to this weight on them and when you start practicing handstands regularly, they really feel it. If you have any questions please don't hesitate to ask (also if you try this please tag me so I can see how you're doing )