elmcrest,
It should be good for beginners, with the exception of my still spotty documentation.
Don't worry about bug reports being annoying, worst case it won't be a bug and I'll just close it, no harm done. I'd rather the project be more stable. :)
It's definitely true that Yota is very young, and things will be shifting around a lot. For instance you mention a standard Int field. Well currently, there is no integer validator. These things will come with time, but what I'm trying to say is if you're trying to build something for production you may want to wait a few releases. However, if you're just learning then working in a young codebase can help you learn a lot.
Also keep in mind that my development cycle is going code first, documentation second. Right now updates are rolling out fast and the documentation is falling behind. There will be significant changes to the AJAX inner workings in 0.1.6, however 0.1.7 will update all the docs and expand the examples.
Here's a simple example, there may be a few typos in it but hopefully you get the idea. Let me know if you have any questions.