First things first, those disco lights your DJ is providing might bring a vibe to the party but you don't want to be shades of green, red and blue in your photos therefore I recommend asking the DJ to hold fire on any coloured lights till after the first dance. Secondly, don't feel like you need to pick a song that's 'traditional' pick something that has meaning to the both of you. Songs have such an amazing nostalgia, pick something that takes you both back to a moment. Thirdly, confetti cannons during the first dance are epic! My next tip would be to make the next couple of songs after the first dance bangers! People tend to save their best songs till later on in the night but put on the songs that are guaranteed to get everyone up and dancing and start the party like you mean to go on. Lastly, embrace your moment, no elaborate dance routines required (unless you want to!) don't overthink it, enjoy your moment and soak up all the feelings of the day.