A good way to approach the decision of whether to hire a lawyer is to buy (and read) Nolo's book How to File for Chapter 7 Bankruptcy. It will give you a good idea of what issues may arise when you file, and flags specific situations when a lawyer's help is called for. It will also give you a good idea of whether the filing process seems to complicated for you.
The most common types of personal bankruptcy for individuals are Chapter 7 and Chapter 13. Chapter 7, known as a "straight bankruptcy" involves the discharge of certain debts without repayment. Chapter 13, involves a plan of repayment of debts over a period of years. Whether a person qualifies for Chapter 7 or Chapter 13 is in part determined by income. As many as 65% of all U.S. consumer bankruptcy filings are Chapter 7 cases.
When the debtor completes payments pursuant to the terms of the plan, the court formally grant the debtor a discharge of the debts provided for in the plan. However, if the debtor fails to make the agreed upon payments or fails to seek or gain court approval of a modified plan, a bankruptcy court will normally dismiss the case on the motion of the trustee. After a dismissal, creditors may resume pursuit of state law remedies to recover the unpaid debt.