Just starting at 32 with wife and 3 kids.

[AJ Holt]

Hello everyone! I discovered BP a few years ago but only really got invested back in September of 2021. I have read Set for Life and want to start working toward my FIRE goal. My question is: I am 32(starting late I know) with a wife and 3 kids. I make $62,400 annually and have no debt except for my mortgage which about 1.3 years old. I don't know the best place to start for myself and my family. 

Obviously saving is important but right now in our budget with school costs, expenses, and food, I can only swing about $500/month that I put into a ROTH IRA account. We have $4500 in our banks savings account for emergencies. I work for a non-profit that contributes a 5% retirement stipend every month(I am not required to match to receive it) to a 403(b) account.

So is my first step to find side income of some kind?