@llEmil - welcome to the forum. We all enjoy Codea, too!
The next update doesn’t have a release date. They are usually released once all the bugs are gone, and that can be unpredictable.
All the tutorials are on the wiki link at the top, and Codea has built in reference help (the little arrow at top left on the main Codea screen).
I have written some ebooks for beginners, here
http://coolcodea.wordpress.com/2013/06/19/index-of-posts/
If you use these, I would start with the Lua book, then the Codea book, then the 3D book
Codea doesn’t help you to draw 3D models (other than simple blocks and maybe spheres), so use something like Blender for that. Some of my posts show you how to import a full 3D model into Codea, but that is pretty hard, and you need to be familiar with Lua and Codea and 3D before you try any of that.
If you’ve not done anything like this before, it will probably be six months of hard work before you are ready to try 3D models. (If you have previous experience, it may be much faster, of course).
Feel free to ask questions as you go, but we recommend you keep all your posts for a single project, in the same thread, to avoid clutter. If you post code, put three ~ on an empty line, before and after the code, to format it nicely.