How do I figure out where to put beads in hair that is still straight?

So, I just started natural dreading a few days ago and I have read some stuff about beads being good for helping the process along. I want to try it, but it occurred to me that putting beads in my hair (which is still pretty straight with no dreads yet) would basically be like sectioning it, so I was wondering if I need to make sure the locks of hair I choose are a certain size and shape at the roots, or if it's fine to just put them in willy-nilly?
updated by @laura-breitenbach: 06/23/18 04:57:00PM

let it section itself then put it in a section that formed if theres a lil hair from far away in it just pull it out

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Okay, will do. thanks for the tip

soaring eagle said:

let it section itself then put it in a section that formed if theres a lil hair from far away in it just pull it out

I know this is a very old thread, and this might sound like a stupid question with an obvious answer, but how do you know when your hair has sectioned itself?

I feel like mine is beginning to, but I’m not sure whether they’re just curls. Unless all of those curls will all grow into individual dreadlocks? 

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updated by @aquaguy: 06/23/18 04:58:53PM

A section is a strand of hair which keeps together without beeing locked yet. Sections can be straight or curly. My hair sectioned in curls, that stayed together till dreaded, even after washing. I think that's why people are afraid of washing in the beginnig, because they are scared losing all their sections. Yes it seems like yours start sectioning itself!