Start by looking at your loan contract. Some loans may not allow you to transfer or refinance without paying exorbitant fees, so keep that in mind.
If your loan has no penalties for transferring, great! You can move on to the next step.
Although transferring the loan often requires you to refinance, some lenders may also allow a new lender to apply for the loan. A successful applicant will need to have a steady income and a great credit score—hopefully, your mom falls in this category! Otherwise, it may not be worth the effort.