You can use both federal and private student loans to pay for your education. You should try to get federal student loans first, which you can apply for by completing the FAFSA. Then get private student loans to cover your remaining expenses.
Student loan servicers collect payments, provide customer service, and otherwise manage the administration of student debt. You're assigned a private loan servicer for federal student loans and can't change your servicer without refinancing or consolidating your loans.
Student loan debt has proven to be crippling for many students, but forgiveness programs are available in addition to cancellation and discharge of loans. Most loan forgiveness programs stem from employment in certain fields through either federal or state-based programs.