I'm not clear on what you mean by "reimbursement"? Do you mean "principal repayment"? As you pay off the loan, more and more money will go towards "principal repayment" while the amount of "interest repayment" goes down.

Perhaps you're not understanding how the loan works? Each day you're charged interest. Say you borrowed $10,000 at 12% interest. On the first day you get the $10,000 and get to do with it as you please. At the end of the first month, interest has accrued at approximately 1%, so you actually owe $10,100. Let's say your bank has set the monthly payment to be $200. After that first payment, $100 goes to "interest repayment" and $100 goes to "principal repayment", and your balance goes to $9,900. Your statement may just show the balance going from $10,000 to $9,900. You sent in $200, but it correctly only reduced your debt by $100. The next month, the interest will only accrue to $99 (1% of $9,900), so the same $200 payment would be split into $99 for interest repayment and $101 for principal repayment, and your loan balance would drop to $9,799.

When you say "goals" meaning is useless, what do you mean? You have to repay the loan by the minimum required when you took out the loan. For your loan, that appears to be $372/month. That's your baseline and shows you how long and how much it would cost you if you stuck to the minimum required payments. If you have extra cash some months or every month, then you could shift the payment up, for example to $400/month. The goal would recalculate how long it would take you to repay that loan if you were able to stick to that higher monthly payment, and show you the amount of interest you would save and how much sooner you'd be able to pay off your loan. If you don't adjust the payment any higher, than by definition, you won't save anything at all (assuming the interest rate is fixed).