Forgoing Salaah with Jamaat in the Musjid due to not possessing good clothes

Q: I am a teenager. I fullfil my daily salah with jammat but now I can't go to the musjid because I have no more clothes. I have only old clothes which is not in that condition to go musjid with wearing them. I suffered some financial crisis also I am a teenager so my clothes are unusable very fast as I grow but nowadays I am fullfiling my salaah at home. I know this is not the way of the prophet (sallallahu alaihi wasallam) but when I get clothes, I will rejoin musjid insha Allah. I am also very poor. Making clothes only in eid or some events, so this is only problem of some months, so what should I do?

Hall functions

Q: I recently stopped attending hall functions. I often get questioned as to why I'm not attending, as the functions are completely separate and no haraam is taking place. Please advise.

Beginning of Esha time

Q: I read that Maghrib prayer time ends when the redness in the sky goes away. Also I read that it ends half an hour before Isha Azan. Which one is true? Half an hour before Isha azan I feel the sky becomes darker. Can I still pray Maghrib or should I mention as qadha namaz? As I'm a working woman and gets little late to reach home and can't pray in van.