Being a parent is not easy and at times you may need extra help. Don't be afraid to reach out. Most of us need support sometimes, and family members and friends are usually willing to help you and provide advice.
You might also think about joining a parent support group. You'll find that other parents have similar experiences and can share valuable information and resources. If you're a single, ask the other parent, a close relative, or friend to babysit your child.
Since you're parenting full time, it's especially important that you take time for you. Doing something you enjoy that will help you relax and you'll become a happier person and parent.