Re: What am I looking for when inspecting?
The first step is to determine what the purpose of your inspection is. What will you be looking for? Have a goal in mind.
This time of year there is much less likelihood that they will be swarming so your main goal right now might be to confirm that you have a laying queen, and evaluate their stores. Your inspection can be as brief or as thorough as you would prefer. There is no need to go through each box frame by frame, unless you consider it a learning experience and have the time for it. Just be aware that the more thorough your inspection, the more disruptive it is to the colony.
In just a couple of minutes you can do a quick inspection to evaluate their general condition. First separate the boxes, lift them to determine approximate weight of stores, and you will have a pretty good idea if they are OK or need some help. You could pull a couple of frames if you like to see if they have both pollen and honey stored up. Then you can very quickly check a couple of frames in the center of the brood boxes to see if there is brood. If you find eggs there is no need to try to find the queen.
Spring will require more thorough inspections and manipulations to stay ahead of swarming, and you will want to inspect more completely in the fall as well to make sure they are set for winter.
Don't worry too much about what is enough or too much. My first couple of years I was in the hives every week, I think every beekeeper I've talked to did pretty much the same thing. It's a great way to learn, and the bees are tough so they can handle it. Just have fun and learn as you go.
To everything there is a season....