With so many, how does one know which one is the correct one to follow? Serious question here.
It isn't a case of one denomination being "right" and all the others "wrong". Different denominations have different strengths and weaknesses. They have different worship traditions, different ways of celebrating Communion, different approaches to evangelism / prayer/ church government etc. The Bible doesn't lay down hard and fast rules for these things, which is why after 2000 years there are so many differences of opinion.
So.. choose the one that suits you best. If believers baptism is a big issue for you, join a church that practises it. If you don't think women should lead services, then choose accordingly. It's unlikely that a local church will 'fit' with your theology in every respect, so decide what matters to you and what you are prepared to compromise on.
I've been a Christian for 50 years, and in that time have belonged to Anglican, Baptist, and Pentecostal churches. A lot depends on the individual church and its leadership - there are many Anglican churches where I would feel very uncomfortable indeed, for example, but I stayed at one for over 20 years!