Perspective isn't a consideration, it's a foundation you must abide by. It determines how the events are organized and how the action flows. Now before you start getting crazy ideas, I have but one rule for you to follow: stay consistent.
You're only gonna be worrying about two perspectives: first-person and third-person. It's the difference between "I hate you" and "he hates you." Which perspective you adopt hinges on your story idea. Is it going to be an epic with scenes happening in different places at the same time? Go third. Is it going to be about one person and how they grow as an individual? Go first. Once you've selected a perspective, stick to it like Wolverine on a bullet train.
Packaged with perspective is also the issue of verb tenses. Far too often do I read stories where the narrator slips into the future, past, and present all at the same time. It's not just wrong, it's stupid, and ignorant, and an insult to the English language. Okay, it's not that offensive, but it's so pervasive, there should be a Surgeon General's Warning slapped onto every word processor to keep this epidemic from spreading.
I go to school and entered class.
The untrained eye cannot catch this. If you can't see it, then please slap yourself with a dictionary a hundred times until the past and present tense forms of all verbs are seared into your brain. All verbs in a sentence must conform to one tense. There are exceptions (English has many), but this holds fast for 90% of your cases.
For beginners, my advice is to start in first-person, because that's our most familiar reference point. We are always thinking in terms of "I." If you're going to be writing as a character, I strongly urge you to stick with your own gender, not only because of the familiarity, but because you can easily expose yourself if you don't. There's a reason why Victor Frankenstein is an overdramatic, wailing, male lead--he was written by a woman.
For tenses, use the past form. It's the traditional mode of narrative and imposes a level of control necessary for grasping the basics. You don't wanna go fast when you start out, you wanna be slow and methodical. Slow and steady may not win the race, but at least you're not going to screw it up.
