anonymiss- you mentioned paralegal and computer programming as career options. Do you personally know anyone who recently entered either of these fields and makes a decent salary working part-time? Generally, well-paying office jobs require full-time hours plus some, not ideal for a young mother.
As you also mentioned, physical therapy can be a good option; just realize that it frequently requires strenuous physical labor, such as lifting or moving disabled children/adults, also not ideal for a young mother.