Welcome aboard mate.
Two most important things you can do first up are make sure you clean and sanitise thoroughly and try and keep your fermenting beer at a nice stable temperature, usually ~18 degrees and ~12 degrees for lagers. If you're using kits, then you've most probably got ale yeast (regardless of what the kit says) so keep it below 20 degrees and you'll be sweet (wet towels around the fermenter and a desk fan work brilliantly).
JD