Devorice lawyer

Tomorrow im going in for a free consultation for a devorice. I'm 23 i have a 2 year old and 5 month old. Been married for 2.5 years. I am so lost I was reading reviews and people are saying bad things about how expensive it was and how long it took. They said the price doubled and stuff. Im so scared because I. Never done this kinda stuff but I am so unhappy in my marriage so i guess i have to go through this stuff. My second appointment i was told was going to cost $100. I dont even have $100 for food. I have good credit so lones are no problem I just dont want to be ripped off. Any advice? What should I ask tomorrow?