tranquility

I’m going to seminary this year and was wondering if anyone can help me figure out what kind of uniform clothes to bring. I bought nice long sleeve button downs but i don’t know if it’s better to buy cheap ones and cut the sleeves off and wear them with cardigans and sweaters. Do most people wear button downs by themselves or wear sweaters over their shirts? Also, my sem said “loose oxfords” but I didn’t want to look like a “box” so i got more fitted shirts, they’re not untznius or anything they’re just not extremely loose, is this okay?