How I Should Dress
It's not how you "dress" that's important. You will find a variety of dress styles. There are many people who like to dress up in "Sunday Attire" (Coat and Tie) and there are many who like to be more casual in their dress. So we would encourage you to dress in whatever makes you comfortable. Since the Lord looks at the heart, dress should reflect appropriateness for the occasion.
The emphasis is upon glorifying the Lord.