Maybe God's like a father in heaven, or maybe it's more like an impersonal force. Maybe she really cares what we do, or maybe not. This really matters because it will affect how we choose to live. But how can we be sure?
We surely can't just believe what we like - a lot of people treat religion this way, but that would only be sensible if God doesn't really exist to contradict our ideas. So we need to work out what is true. Cecil Rhodes: "If God exists, the most important thing in the world is to know him."
There seem to be three main possibilities.
Option 1. All religions may lead to God.
This is an attractive idea. It gives everybody, whatever they believe, the opportunity to experience God and an afterlife. Everyone's a winner! But it is hard to see how it could work. For example, what if our local religious practices included human sacrifice, as did the religions of the Mayans and the Canaanites? Would that lead us to God?
It seems then that at least some religions don't lead to God, or even acceptable behaviour. So, like everything else we know, some things are going to be true about God and some are not. Either he cares how we behave, or he doesn't. Either she approves of some sorts of behaviours, or she doesn't.
So it doesn't seem possible that all beliefs are equally true. Some say it is arrogant to believe that one religion is true and all the others are false, but:
Option 2. God may exist, but wants us to live a good life without any promises or threats from him.
This view is superficially attractive. It provides the comfort of believing we are not alone and that death is not the end, and it doesn't require us to hold to any particular religious beliefs. It is a belief often held those who are not strongly committed to any religion, but is less common among those who have committed themselves to knowing God and following a religion (they may find it insulting to their faith).
However, this view presents some difficulties for the honest enquirer.
Option 3. If God exists, and wants us to know him, he would do something to let us know.
The previous two ideas do not seem to take us very far - we are still left having to consider what God may be like.
It can very nice to think about the human search for God, but it is an idea which raises problems. If we mean a deep and meaningful search, via philosophy or meditation, it seems to leave out those with insufficient intellect, education, spiritual awareness or time to make the search.
So if God was fair, surely she would give us a few clues, give us something to go on which virtually everyone could understand. Surely God is at least as eager as a parent trying to communicate to a newborn baby through the glass at the hospital? And surely there'd already be millions of people who had already found him, or the way?
So if we want to have a go at 'finding God', we should maybe start looking for a religion, or teacher, or idea which has already gained large numbers of followers. We may not find our answer, but it's a logical place to start. And we might just want to ask God (if he or she exists) to show us the truth.

Comment on this topic in the discussion section.