Beards and Moustache

Q: My question is regarding cutting beard when it reaches length of one fist.

I have noticed there are scholars who say one should leave the beard and not cut it at all because there is no proper evidence. They say that the hadith of Umar (radhiyallahu anhu) tells about cutting the beard during hajj or umrah only. So that means that we cannot cut the beard during any other time. They also say that according to one hadith narrated by Abu Hurairah (radhiyallahu anhu), Nabi Muhammad (sallallahu alaihi wasallam) said to cut the beard and leave the beard, i.e. don't touch the beard.

While there are scholars who say that Imam Ahmed (rahimahullah) used to cut the beard when it reached the length of one fist and also gives proof of other righteous predecessors. So, is there any evidence that Umar (radhiyallahu anhu) used to cut his beard other than hajj or umrah and other Taabioon or 4 great Imaams did it? 

Q: Is it sunnah to shave the moustache or trim the moustache? If both are sunnah, which one is more preferred?

Q: Is it necessary to keep the moustache or is it permissible to shave the moustache off and keep the upper lip clean as I am aware that when you grow a moustache it should not overlap the lip line.

Q: What if a guy is not keeping his beard out of fear for people that what will they say? Is he doing shirk or kufar or some sin? I'm aware that not keeping a beard is a sin, that's what i heard. But I want to know if a person does not do something because of fear for people which he should be doing, is it's a sin, kufar, shirk?

Q: I want to grow a beard but my mother is telling me to only grow my beard after marriage. I live in India and there is a lot of difficulty in finding a girl if someone has a beard. I want to get married as soon as possible because there is a lot of fitna and temptation here.

Q:

1. Can I know any authentic hadith and examples other than that of Ibn Umar (radhiyallahu anhu) of cutting a fistful of the beard?

2. When we say cut a fistful of the beard (exceeding one fist), from where do we take 1 fist? How do we know this? Is there any authentic source which mentions that one fist is from the chin or do we just assume it?

Q: Is keeping mustache permissible in Islam?

Q:

1. What is ruling of increasing the beard in Islam

2. What part of the beard can be cut?

3. Can we remove hairs near the throat and neck?

Q: I am 18 years old and studying in 12th grade. I am growing a beard but my beard looks odd. I used gel to make it look straight but nothing happened. People everyday say me to neaten my beard and criticize me. Well all of these made me lose confidence. I dont want to meet people because they will criticize me. Can I just neaten my beard and will let it grow step by step?

Q: I came to know that In Shafi Madhab cutting beard is Makrooh (disliked) as said by their two great Shaikhs, Shaikh Al Nawai and I forgot the name of the other Shaikh. Can I follow Shafi madhab in the ruling of cutting the beard as I follow the Hanafi madhab but because I am feeling great resistance from society.