I've seen FAQs, and even linked one that looked good, but I cannot find that post with the search function, and I don't want to go back a year or so and find it manually. That said, don't expect many good ones.
1) QM is, believe it or not, difficult (big surprise, right?)
2) what needs to be said really depends on the directions your thoughts bend when being exposed to it - covering every blind alley that could screw someone up would slow everyone down to a crawl, unless you go very formally, and then see point 1 even more so.
Previous Open Thread
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one.
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.