I have pasted this in so many threads, but I'll post it again ~_~.
As you said, you're a beginner, which is fine, everyone's a beginner at some point :3. I'd suggest reading some tutorials on basic sig making fundamentals so you have a general idea of where you should be heading because right now it seems you don't really have a guide or any ideas in mind before putting the render in the PSD.
As for tuts
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. Honestly, focus on this tut the most.
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. Though I go over some things the tut above doesn't go over (mostly terms)
They're long reads, but necessary if you truly want to get better at sig making.