When my only child (now 14) started K, I was lost.
I threw myself into volunteering at the school and found that I was quite good with the students. The principal saw me there all the time, she asked me about substituting.
It was perfect...sub at the school where my daughter was. I've been doing this in the PISD at 1 school only since 2000. Most of my jobs are planned in advance and i get very few of the late night/early am calls.
Even since my daughter moved on to middle school, I still sub at the same elementary. They allow me to come in a little later, after I get her to school. It has been a wonderful opportunity I have enjoyed and made a little money.
Now.....DO NOT do this if you are looking to make money, it is just a little check but I get my hair done, nails, etc with that money. While you are "finding yourself" now.....GO DO SOMETHING SPECIAL FOR YOU.....get a mani/pedi, massage, or something nice and relaxing for you.
I also believe it is very important to also be home for children as they get older. I would miss so many things that go on with daughter if I worked full time outside the home.
Also, think about the added expenses of gas, car upkeep, clothing, meals, entertainment that are involved with working outside the home. With subbing, I can be casually dressed and grab a bite in the cafeteria.
One thing about working within the shcool is the added knowledge you get "behind the scenes" which can dramatically help your children. Now, I will not sub at middle school or higher. Those kids are bigger than me and that does not interest me. I admire the teachers in the secondary levels.
Good luck!