I'm not an expert, but I've been having various ovarian issues since early September, so I've gotten several ultrasounds and have read up a lot on the subject.
I can't answer all those questions, but I can at least partly answer a few of them:
1) As far as I know, fibroids aren't generally considered dangerous, although they can certainly cause symptoms, even if they're small (the dimensions you've listed are pretty small, so I wouldn't be worried - of course, since you said you're still experiencing symptoms, I'd still recommend talking to your doctor to ask if this fibroid might be the cause - your doctor will be the best source of information about whether the fibroid is causing your symptoms and if so, what options there are for resolving the issues).
2) There could be a few possible reasons that the left ovary is not seen - various things can obscure it on the ultrasound image, such as intestinal gas, etc.
3) Don't worry that the right ovary is "unremarkable" - in fact, that's a good thing
It means they didn't find anything of concern - basically, it means that the right ovary looks totally normal with nothing out of the ordinary.
4) No adnexal masses and no free fluid is also a good thing. Mind you, even if these were present, they wouldn't necessarily be a cause for concern depending on the size of the mass/amount of free fluid, but it's better that they didn't find those things.
5) I don't know what a cystocele is (are you sure they didn't mean a cyst?), but in terms of the bladder being distended to 241cc I'm guessing they're just referring to how full your bladder was when they did the ultrasound (again, I'm just making an educated guess here - I don't know for sure).
I'd recommend writing down a list of any questions you might have and any symptoms you've been having - this'll make it easier to make sure you don't forget any important points/questions at your OB/GYN appointment.
Hope this helps!