Christianity has at least two steps - the first is becoming a Christian, which happens in a moment. This is a wonderful experience; but after some time the overwhelming feeling fades - as it is meant to. Then the question arises - what now?
Traditionally, the convert spends the rest of his mortal days learning and practising the Christian 'lifestyle' as it is understood by the denomination of his church in a particular time and place. That is one possibility.
Modern liberal Christians - a many evangelicals - reject a highly detailed prescribed lifestyle as being unscriptural; and there is a tendency for such to put their efforts into 'politics' of one sort or another: into trying to achieve Social Change. This usually ends, sooner or later, by leading out of Christianity; at least it does nowadays, when politics is so corrupting and evil.
If we reject (or cannot live by) a detailed-prescribed lifestyle; and if we also reject the mainstream 'social activism' of the mainstream churches - what then?
Another way forward is the spiritual - to cultivate and strengthen the spiritual side of of Christianity. In other words, to work on the form as well as the content of our faith.
Another way to put this is to try and change our consciousness. That is the very texture of the way we think and feel - and to make it more Christian. Because the spiritual is not restricted to believing in Jesus in the same way we believe in the factual validity of an Encyclopedia; Christian belief is supposed to be a different, deeper, wider, personally-involved way of believing.
Because mainstream modern consciousness, the way that most people including Christians think and feel, is in conflict with Christianity. We are materialists, prone to positivism, scientism - we live in a world of dead (un-alive) 'things'. We experience being cut-off from the world.
So long as people experience and think this way, they are falling far short of the way that we ought to be experiencing and thinking.
So, this is something that a newly-minted Christian could do; something to work-on that would enrich and strengthen their faith; a life's work, indeed.