The current experimental state of UI Designer does not support partial views and we are aware of various bugs related to it, but we are going to improve it in the next major release at the end of the month. Until then I recommend using the Code editor.
As for any guides how to develop using Telerik Platform, I suggest starting from our Quick Start tutorials and taking a look at Kendo guides below:
1. Kendo Guide
2. Kendo Documentation
Video courses you can find at pluralsight.com if you prefer them.
If you require additional assistance do not hesitate to write back.