After making several assumptions about your question and its context, the short is answer is no it is not mandatory to go to church, but yes some people go for many non-religious reasons ('impressions'). Since the description of the question has the terms 'God' and 'church', I'm assuming you're asking in regard to Christianity. Please note there are many religions with 'God' and the required practices vary greatly.
The word 'church' helps, but only some. If you are Catholic, Catholicism holds very traditional beliefs for which you do need to visit a priest (confession, communion). I'm very familiar with Protestant traditions, so this answer will be skewed towards them.
With a belief in a 'personal God', believers have the ability to worship and practice in anyway they believe proper (assuming Christianity again, this worship should be according to the Bible). The definition of this term will vary greatly depending on whom you ask. Back to the full question carrying all the above assumptions: No, you do not absolutely need to go to Church to worship (although, there are many references in the Bible to members of Churches being stronger in their faith) so yes, you can do it from your own home (again, unless we're talking about Catholicism).
Yes, some people do go to church to make themselves 'look better', but most are there for fellowship with other believers, worship, and to learn more about the Bible. If you do not attend church every week, it does not mean you love God any less than regular attendees, but it does probably mean they will be more familiar with religious practices, the Bible, and worship techniques. Faith and its role in life is not easily understood or accepted.
There's a reason pastors, priests, and preachers are normally subject to years of education. These individuals use church to teach believers more about God and what the Bible says about how to live (which makes you a better person and helps you reach a high quality of life). Church activities are meant for members to fellowship with one another.
This mostly means for fun and networking within the church membership. They exist for many reasons such as bettering the community, learning more about beliefs, educating others outside the church, and raising money for various causes.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.