Reminds me of the plywood figurine models I used to build. Break it down: What's the design? Imagine individual pieces... PLAN! Once you've figured out the precision of the design and expenses, go to a lumber store and buy the necessary sheets of wood and very large screws; Or, make smaller connections to bring it all together. Draw out and cut your pieces of wood, sand them down, and make it happen! You got this! ;)
A kneeling chair is what you need if you have to pass a lot of time in your office.Unfortunately this type of chairs is quite expensive and not very common. This is one reason to make your own kneeling chair, which will also make you very proud.