I want to join Track, But I have asthma?

My asthma isn't that bad, but I do frequently get a bit more tired than usual. I had an asthma attack only once, when I was little. Like in 1rst grade, I'm now in 8th grade. Any tips, or opinions? Also additional, but if you know of any good running shoes, not over 100$, the ones I looked at are away too pricey, not even good, and ugly.