no worries
If you are growing in a plastic pot, place the skewer about midway between the center of the pot and the rim - but doesn't need to be exact. In a clay pot, skewer should be as near the center of the pot as you can get it. You can push it all the way down to bottom of pot - but at least half-way. Try to always put the skewer back in the same place to minimize damage to roots once you get some going.
I leave the skewers in the pots, but some people don't. If you don't leave them in, give it at least an hour to absorb moisture before you check.