I would need to I guess put a black tape on the glass stem for stealth. Sadly I couldn't find a way to order a wooden stem but that can wait for now.
First off, welcome to the Forum! Great choice as a first vape IMO.
Too bad you've already ordered, I'd have added a couple straight stems I think. Being glass you're SOL if you have an accident. The bent one is not only more conspicuous but won't fit in the travel tube. The (metal and) wood ones are, of course, a solution as you say.
I'm paranoid, I tend to worry about such things, but it's not like the replacement stem is going to be really handy? We Yanks believe in "Murphy's Law" ('if something can go wrong, it will...'). A mission critical piece of glass half way around the world from support is dangerous open invitation.
Anyway, sure, cover it with tape. Just remember you can't do this to the top of the cover. The glass gets quite hot down there, and hot tape is not going to stick well but will stink up the joint in an effort to compensate...... Maybe half an inch of bare glass? High temperature paint, if available, like in stove and auto use, might be an option? Or perhaps cotton cloth?
Brick weed should work just fine, you'll just need to reload more often. It will extract what's available very effectively. In a fun way sort of an advantage potentially since so much of the flavor of the weed is exhausted before the cannabinoids we crave are? I'd charge it up, load it up, fire it up, set it to mid range (say 4?) and see what adventure awaits. While it can no doubt be improved by experience, I'm confident it won't be disappointing in the long run.
Just remember, combustion and vaping don't mix. You really need to quit combustion all together to get the full benefit of vaping.
Regards and best wishes,
OF