I had my eldest in my teens. I'm lucky in that I found out that I actually really enjoyed being a mother (bookish only child with no experience of babies)
Her dad was an utter dick. Most of the hardship came from him. Take my advice and put your child first and yourself second and let the men take care of themselves, because trust me they won't need telling twice.
Sometimes I look back, and I see how long I've been a responsible adult for and it seems exhausting, and I wonder how I've even got this far. I had my second and last child with my husband recently and am in my late twenties now.
I've bought a lovely house, married a wonderful man, went to university and have a job I enjoy, and I have plenty of good plans for the future. I did lose a lot- it would be foolish to claim otherwise - but I gained more than I lost. Life is good, happy, and fulfilling. I love my family and I like who I am. It is not an easy road, but it's far from the worst one.
The other thing you need to remember is that some people are largely full of shit and will have numerous comments to make on all of your life choices, more so when the choice is three foot high and very visible. You need to develop a thick skin asap and make up your mind to ignore any comments that come your way. Remember these people aren't the ones living your life and making your choices for you - only you do that
But for God's sake, keep up your education or employment and don't be a soft fool over men. Do that and the rest will follow