In a word, simplicity.
What-pistol-should-I-buy is a serious question that warrants a long serious discussion, with a series of pre-questions to determine who you are, personally, and what might be best to meet your personal expectations...but...you aren't across the table from us, you're on a searchable internet forum asking a question that's been asked over a thousand times.
"...I am not yet sure if I'll want to get involved in idpa or ipsc or both so far. Really for now I want to learn good technique. I will plan on doing some carbine and pistol tactical training courses. I am a bit overwhelmed with options. What is my best bet?"
One might deduce that you were an average person who had average needs. One might also deduce that you'd hoped for a simple answer. Your particular stated goals, combined with the fact that you started a new thread, rather than just doing a search, to ask a question thats been asked over a thousand times, leads me to the simple
best-bet answer I provided.
Is there anything about the Glock trigger that makes it more difficult?
That is subjective, and very much a matter of opinion.
I seem to recall reading something about a tendency to pull for beginners or something.
Compared to what? Longer, heavier, inconsistent, triggerpulls tend to be more difficult to master that do shorter, lighter, consistent triggerpulls. Have you wondered why the no-external-manual-safety, no-decocker, no-magazine-disconnect, striker-fired pistol has taken over the market? It has; that is a fact.
Why might that be, do you think?
I guess that goes against the cz everyone tells me. What is the reasoning?
The
double-action CZ, so popular with some target shooters, is often operated with a double-action first shot. The double-action automatic pistol, when operated in a double-action mode, is not particularly simple and is not particularly easy for a beginner to master (compared to the no-external-manual-safety, no-decocker, no-magazine-disconnect, striker-fired pistol). CZ also makes a striker pistol.
It all goes to your primary intended use, what it is that you would like for the pistol to do well, and how committed to the project you expect to be. You didn't say, for example, that you were interested in bullseye target shooting, or even PPC. You didn't say that you were prepared to invest as much time as necessary to become competitive in IPSC Production Division and that you you wanted the most competitive pistol for IPSC Production Division. Had you said that, you would have gotten a different answer.