Well, you're never going to do it if you sit around bemoaning and demeaning yourself. You want to knew where to start? That's the perfect place. You are not your number one concern anymore. That woman, and your child, is. Stop broadcasting your (and her) problems to the world at large, stop thinking about any alternative method for dodging responsibility, and use the time you have to prepare yourself.
Start putting money aside for their college funds. Get a crib and some gender-neutral baby clothing. Research morning sickness friendly diets, and stock up on some cravings food for the pregnant lady. Practice carrying a baby-sized/weighted object while performing chores around the house. Clean the toliet, for if you live with the woman carrying your baby, she's going to be spending quite a bit of time looking at it over the next few months. Research hospitals to find the best prenatal care. Plot the fastest course to the hospital.
Whether you can or not is irrelevant. If you're ready to get a woman pregnant, you're ready to learn how to do this.