Well done, you are just going for it with full confidence, you have a few interviews already, you're getting more interview experience and you are really trying, something will happen eventually. in regards to the question at mcdonalds interview. you answered it with logic, so that's all you really needed to do, so you should be fine. interviews will usually have some awkward moments, and sometimes you'll have smoother interviews, it's just the normal part of things.
another option is to work for yourself in the meantime, perhaps you could get some business cards printed and offer some cleaning, mowing, free lance services in the local area. Because just say you earn 100-200 a week for four clients to start with, it certainly helps with paying bills and it's a good way to earn while you are looking for work. It's something that you can always test out for a couple of weeks.
I read that the hidden job market is probably 60-80% of the job market and the advice is to join some sporting clubs, hobby groups, go to events, walk into businesses and you will find work in no time.
For instance I went along to a careers convention and spoke to an I.T. expert. the guy standing next to him offered me work on the spot, he needed some programming done. Unfortunately I had never practiced that sort of programming so had to decline the job offer. But the whole idea of going along to conventions, fairs, presentations is to educate yourself on aspects of finding work/careers that you may not know about. If you can just ask questions to insider experts, you can walk out with vast knowledge on how to approach finding work.
I mean, a lot of people just think, apply for jobs online and that's it. which is only 10-20% of the jobs market, and people who only use 1-2 popular job search websites are limiting themselves to probably 1% of the jobs market. So 10-20% of the jobs market covers all of the 100s of different job search sites out there.
it's never easy, looking for work.