As for the pritzus (i live in la obviously) when i went to brooklyn, i saw more or less the same things. theres a few billboards here or there, mainly on two streets (which many people are makpid not to walk on) which are not good for kids, but from my experience, kids dont pay much attention to billboards anyways.
As for the community it is very, very, very, very warm, and if i had to describe the yeshivishe community, i’d call it “lakewood yeshivish”. There isnt much in between yeshivish and very modern though. (of course there are yechidim who are in middle)
The elementary schools are great, (i dont know what ur hashkafos are) and toras emes (which ive attended)is a great school, with THE BEST rabbeim, seems to be a very popular choice.
The Beis Yakov is very good, i have sibblings that attended, attend and will attend there. Supposedly this is one of the beis yakovs that the most girls (or at least a lot of girls) get into top seminaries.
As for mesivtos, theres all types. Yeshiva gedolah is very good, with top, top, experienced rabbeim, which is good for very yeshivishe smart boys (some other boys go there too, but it never really works out). The boys from here get into yeshivos like fallsburg, patterson, passaic, torah temimah, r’ motty dick, etc. MBY is also starting to prove itself (its five years old) and they tend to get less yeshivishe bochurim, but a smart kid that goes there will still end up in the best Yeshivos.
If you have any more questions, ask!