Hi Rikimaru and welcome to construct.
A good way to learn fast how construct works is to open and examine the templates that comes with construct.
In combination with the manual is a good way to learn fast the construct mechanics , when you feel comfortable with with the UI ,objects and behaviors you should try to replicate a simple game like ... lets say breakout .
I think after a week or two you will be super familiar with the construct philosophy and you should try to start your first "real" project.
As you can see the community is very friendly and helpful specially with the new members, so if you have any questions relative to "how do i do this and how do i do that " try the How do i section and of course the tutorials.