My car won't start and I can't take it to a mechanic, can I repair it myself?

What is your question?

I have a 2000 Toyota Corolla. About a month ago it suddenly just stopped starting. When I try to start the car it makes no sound whatsoever and, of course, it doesn't start. I think that the battery is still working, because the radio and lights all still function normally. What could be the problem here and is it something that I could remedy myself as someone who doesn't really know much about cars?

How long has your 2000 Toyota Corolla had this problem?

About a month