MissJD, I think every parent wonders (or worries) whether they will mess up their kid. None of us is perfect and becoming a mom or dad doesn't come with an instruction manual. We all do our best, get input from other families, consult books and doctors and experts as needed, stay as informed as possible and love our little ones like no one else can. It sounds as though you have a good support system around you and as long as you are getting the care and follow-up you need, things will probably be fine.
Depending on your son's age, you can make sure he has good male role models by getting him involved in youth sports, having him spend time with school friends or playmates who have a dad present, etc. Is there an uncle, cousin, or brother in your family who can spend time with your son and help him explore his hobbies? Sometimes a coach or neighbor or friend from church will kind of "adopt" a young man and mentor him, but don't underestimate your own influence. Plenty of successful men grew up in a single parent home. It may be hard, but you can do this!
I found a book you might be interested in: _Mothers & Sons: Raising Boys to be Men_. Maybe you can find it at a library. Hugs to you.