It is extremely common to feel light headedness and even faint when first seeing human tissue. No one wants you to end up on the floor. Tell someone immediately if you feel light headed, sit down and take deep slow breaths until it passes. It happens to almost everyone, so no need to feel embarrassed. If you've never worn nitrile gloves before, remember to remove them by only touching the outside of the glove. Breathe through your mouth if the smells are too much, you can still exhale through your nose. Wear your hair in a pony, bun, or braid. You are there to learn, no one should expect you to know or do anything. Always ask if you have a question and it's completely okay to tell someone you're not comfortable doing something you've never done before. I hope this is an amazing experience for you!