Aside from not knowing the relevant law which leaves you somewhat clueless if you aren’t a Family Law attorney, there are three additional problems with representing yourself in a separation or divorce:
You are a reasonably intelligent person. You’ve been through school (perhaps college and graduate school as well), you have a job that requires a significant level of expertise and you understand the issues involved in your separation or divorce better than any lawyer ever could. In addition, you know what you want and what is fair.
In plain language without legalese, Understanding Military Divorce Law explains how the military services and the state courts deal with family law issues.
The answer depends largely on your situation, but in most cases hiring a lawyer is probably well worth the money. No one can guarantee you that hiring a lawyer will be worth the money, but you are taking a blind risk if you choose to go it alone.