Hello world (and why one should pause instead of um)

Man, is it odd typing that. Honestly, I'd never thought of going through this before now. Having clarity with one's audience is important, and as that audience appears to be no one at the moment, what a great time it is to start.
So... about me... well, I'm in 11th grade and see writing as a fun thing to do sometimes. I also like to casually review film and media, and I will probably be migrating those over here at some point soon. Allows me to speak out without speaking up at all, which is great because in writing, no one can hear you stutter, and most importantly say all of those umms, yeah like y'knows, and the like.
While we're on that subject, can I just say in earnest how much I detest people who say these standin words constantly, rather than pausing to collect their thoughts? Because it's a real issue. All of those ums make you seem insecure, unsure of yourself, and overall unprepared, three things you most certainly do not want when speaking to a superior- or worse,  in an interview.
So, ladies and gentlemen, I will now advocate a little friend I affectionately call the pause. He's all arouund us, creating silences that are at times warranted and at others simply awkward. He easily stands in for the um, and does so with flair, allowing the user of it to collect his thoughts instead of find a way to fill the space while he does so. Used well, a person can pause to look more professional,  taking a quick breath between points to allow their audience to take a break as well.
So, to wrap this up in a friendly way, rather than stuttering, just stop. Your argument will be all the better for it, and your audience will happily wait for you. So do give that a try.
Thanks for reading, I do appreciate it. This is my first time doing something like this, so leave feedback in the comments below and I'll see if I can take those into consideration.
Cheers