There is no getting around it.
You can’t run, or at least run well, without the right shoes. In an ideal world, you should get fitted at a running store so they can test your stride and determine what kind of support you need.
But if you’re not made of money, at least invest in a trusted brand (I’m a New Balance girl). Break ‘em in walking around before you attempt a long run, too.
Blisters are serious business when you’re miles from home and without band-aids!