amortization on a house can be very different than other amortization loans as most have such a large balloon payment at the end of the term.

These are very helpful tools in helping you calculate just how much you pay in interest on a loan. Be it a house or a vehicle. Here is one:
https://financial-calculators.com/amortization-schedule

And here is another that shows the changes if you pay extra on the principle:
https://www.calcxml.com/calculators/extra-payment-calculator

If anyone can add to this, please.......