Be the dad. There are no prolific ideals here. Be the dad. Don't fear being a dad. If you had the audacity to be with her and get her pregnant, then please have the audacity to care for the child.
Do not make excuses for not being there for the child. You don't live with them? Okay. Make your times happen. If there are problems between you and the mother? Fix it! You don't know how to be a dad? Ask! Read! Seek fathers who have been successful. Yes, there are many out there. The Bible tells us to seek the advice of many counsel and you will be victorious...even in being a dad. I'm so thankful for several examples in my own life. My dad is incredible and has become better as the days grow. I listen and watch. Another example for me has been a man named Carlos Scott. Through questions and having a watchful eye I have seen how to create a successful family.
Fathers, again, please do not make excuses. Do what needs to be done to make it a success. It can happen. With God's help, MAKE IT HAPPEN.