Dating a Person with Children

I am very interested in entering into a relationship with this guy. He is absoloutely wonderful, but I learned that he is a father. I am hesitant about this because I am 19 and a virgin, so obviously children are not something I have been prepared to manage at this point on my life. I do not want to miss this opportunity at happiness with this man just because kids are not something I had pictured for myself yet. It could be an unexpected blessing, but I am still nervous and conflicted. I would love advice from people that have been in similar situations! Thank you.