Taste it when it's done and decide what to call it. Unless you're entering it in a competition, it's really not a big deal as long as you enjoy it. It's just nice to be able to easily describe it to someone, that's all. So if it's an "ESB with American hops" then someone should be able to figure it out.
If you still have your training wheels on, focus on making solid beer before you worry about making solid to-style beer. It's a skill you'll always need.
for sure! i don't plan on entering this one. the only beer i did enter into a comp was back in 2008, the et barnette homebrew comp. it was my second beer to brew and i won best ipa and third bos (sometimes it's better to be lucky than good, hahaha.).
if the specialty grains don't make it weird, i hope "esb with american hops" describes it.