This is a beautifully-simple website to calculate a debt snowball (paying off lowest balances first) or debt avalanche (paying off highest interest first). It has great graphics and is easy to navigate. See how fast you could be out of debt!
Dave Ramsey. He’s one of the most well-known names for getting out of debt. His 7 steps have worked for many people. The logic is there. Also try his book, “The Total Money Makeover.” It’s a simple read and he has a great perspective. (https://www.amazon.com/Total-Money-Makeover-Financial-Fitness/dp/159555078X)