All your plan seems to be lovely with all those details based on your concept ... and this one pic has a pretty interior. I like the kitchen area, it´s a good working kitchen for a tiny space.

I am in the process of building a cabin and I have been looking for designs in the web. It´s got to be max . 30 sqm and I have a plan similar to the pic you posted. I already bought the land near a coastal area of about 1 km away to the beach ( from my crypto earnings). Right now, I had it fenced and the gate has been constructed too. All I need now is to finance the building.
The land is located in a coconut farm in the Philippines owned by the father of my sis in-law. I convinced him to sell a piece of his farm for me to build a cabin so we have something to dwell when we visit the farm and eventually go beachin...Cheers to your plans of atiny house, hope you´ll get it soon! A coffee is underway.... Happy weekend my friend!