I realized when I started in this hobby that I knew nothing at all about it, and that the old hands at the club launches, while they are helpful and supportive, are so far advanced beyond me, that they can't really assess what my skills and interests are until I built one.
So, I stopped by a local hardware store with a hobby shop department, and looked at what they had on hand. None of the kits made much of an impact upon me, as I had a hard time visualizing the difference between them.
However, from my readings, I had learned of a series of Skill Levels 1, 2, 3, 4 and that as an adult, I was probably beyond the RTF or Level 1 kits... and so I looked for a low-cost, moderate kit that would allow me some construction, from a reputably company, and that I asked what all else I would need... motors, launch pad, wadding, etc. I had all the tools, materials, glue, paint, etc, to at least complete it, and the salesman/clerk was very helpful in interpreting what those cryptic letters and numbers on the engines meant. He assured me that when I got ready, this particular package of motors would match my rocket and get me started. He was right. I cobbled up a launch rod, a lantern battery, allegator clips and make-shift blast shield and was ready.
I went to a club launch immediately after buying the kit, and marveled at what all was being launched, how powerful, how ambitious, and what variety the vendor had on hand. After absorbing as much as I could, I determined I should buy another slightly more advanced kit so that I could continue working and learning and compare the two rockets. So I got another kit of the next higher skill level and requiring the same motors that I had on-hand... and got a little distracted from the hobby after the first rocket was done.
Since then, I have attempted to buy a slightly more challenging rocket, slightly stronger and longer, and larger of increasingly difficult assembly or prep, or construction, while still maintaining my LPR level motors. I've learned a bit about motor letter class, and realize if I'm going to proceed, I'm going to have to graduate up in motor strength, size, commitment and costs. But I've still got a fair amount of LPR motors to burn up first.
And so, my family has decided to take advantage of cyber Monday and have ordered dear Dad a model rocket kit to assemble, sight unseen, after shopping on the internet. So how do I decide what to build next?
I try to stretch myself and let someone else talk me into trying another one.