What product or advice can you give me from dying my hair from a med brown to a carmel color?

for the first time, go to a professional stylist, they'll get all the roots to tips done correctly. Ask them how many shades lighter than your natural color the new color is. Then when you can see your roots, you can go to a store like Walmart or Target and get a color the right shade since the stylist told you, never die your whole head to a lighter color by yourself the first time, since the bleaching can be tricky (you could either get the wrong color, or the color will look patchy and different color in spots, and these spots will not look like highlights)