No longer buying but now reading and learning, a little bit backwards but I've learned from my mistakes and still learning.
I think most newcomers did the same. Many thought there is an easy way to make money, many even a simple way to get rich. And for most others, just a way to bring in a few extra $$, but there is so much to know.
People don't realise until they're at least 4-6 months in with many many 10s of hours of reading, that it's not much different to the stock market in terms of knowledge and experience requirements, and most people know that requires a lot of experience etc.
I highly recommend reading (well in general :D) but specifically zandibot.com. He makes a lot of sense, and reveals a lot of the pit falls new domainers make as well as next level advice about more commercial approaches etc.
Also view some vids on DomainSherpa.
Some good reading:
At first you should read a lot, this is obviously something you are realising (again, it's a common pattern with newcomers, myself included some time ago) but importantly: also read between the lines
and figure out things for yourself, as there's a lot of "false hope" around which means inaccurate advice.
Also, try not to be too creative etc, stick to something that has obvious commercial value, and aim to make smaller profit at first while you learn. Then once you've learned the more straight forward markets (ie .com, net etc) then you will have knowledge to start pondering over potential investments in lesser known things. But you really need knowledge for such things as they're more a minefield than .com sales, and that's saying something