Telling how to just open a file cant really help, my best advice its to follow the tutorials, and not just one, they are design in a way that you need to do them all, one at a time.
I haven't tinker with the editor too much, but so far seems as one of the easier to use editors of it kind out there, the big problem its that to make anything worth it required a lot of work, but is not the editor fault.
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