By changing the data model, I define new types (documents). I notice that by default, these new types are applicable only via the "Change Type" action and I see that it is not very convenient … I would like your help to choose the type of document directly at the time of upload to Share.
Thats weird, probably something with your configuration thats wrong then. I've used the steps described in the blog post with success, however thats with the EE versions. I'm not sure if something changed in the latest community release or not regarding this.