The security rating of the system will lower the planet's richness the further you increase towards 1.0
There are two important things to teach for setting up a colony. One is the fiddly little detail of routing confirmation (something i find i forget every once in a while); The other is actually creating a colony that's intuitive and hasslefree.
For the former there are no easy ways about it. it's pure rote with the last step being the most important.
For the latter there are a number of shortcuts that make colony life sooo much easier.
To start off with always right click on the planet and enable 'show other colonies'*, then without moving around zoom in and place your colony HQ right in the center. This curtails the game code from trying to center it's screen on wherever you placed this redundant** device.
Upgrade the HQ right away to your maximum and hit submit (i find it's more expensive to upgrade one level at a time.)
That's "Stage One" (i use "stage" to mean each time you hit 'submit')...stage 2-6 are below:
*- If you click on an individual HQ icon of another player their infrastructure icons will appear on screen. Very handy for finding out exactly where the least punked places on the planet are (and remembering where you placed your alts' colonies so you don't punk yourself)
**- If you ever need to use the HQ to launch into space, simply turn off a few mining heads at an extractor and create a temporary link from your colony to the HQ and expedite a transfer(s) that way.