My Corolla with 26,000 miles on it has a problem. It started last night, headlights work, but no interior lights work nor the dash lights. Shouldn't be the battery, would it be electrical or a fuse, if so how do I start to check. I'm too poor to take it somewhere. Help is appreciated!

Test all under-dash and under-hood fuses with a test light or multimeter:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-46563-3.html#post252145