This is probably a good time to start. You have a bit of breathing space to learn before the next holiday. Each store probably has their own ways of doing things, but as someone who has been working on the front end of a Target store for almost two decades, I have learned a few things. Get to...
In my store, they allow plaid shirts, as long as red is the predominant color. Personally, I prefer a pure red polo for warm weather, and a red sweater for cold weather.