There’s no real harm in trying. I’d suggest costco just for the 6 month trial window.
That being said, I’ve worn aids almost 2 years. About 6 months ago I stopped wearing my right aid. My loss in the right is mild. The aids do help that ear, BUT, aids don’t make it sound like normal hearing, it’s not quite the same. I found that with the aid, some things were better, some annoying, and same without. So I just went with one.
I say that because your loss level is mild so will you have an improvement? Probably. But the question is how will it sound compared to none. Hence the suggestion of a longer trial.
Good luck!