hi there, and welcome to WW. Your story sounds similar to mine - always wanted to write, and wrote bits and pieces but started doing it seriously when I had to give up work due to my second child's health issues.
And we are all familiar with rejection and heartbreak! Unfortunately it's part of the whole writing journey, but there are lots of good bits as well
It's probably a good idea to join one of the groups for uploading and commenting on work - there's a women's fiction group that might suit you.