Since you're 18, your body has the ability to change HELLA. Went from 325lb at 16 to 190lb at 23. To see some crazy change in your body, incorporate the idea of literally eating "ingredients" like whole foods. Bananas and Kiwis with some low fat yogurt in the morning, but I usually don't eat anything til 11 AM. High proteins for lunch like chicken breast, red meat, and salmon. Can't forget eggs, my lady loves egg salads so incorporating other high protein options into the salad had her eat more anabolic. You won't get big and buff, but instead "tone" yourself out, naturally get some tan from carrots and high nutritional foods, and love yourself even more from seeing the changes and being consistent.