Hmmmm.....I use Photoshop (graphics editing program), not Illustrator (vector graphics program), so I can't tell you whether you can do what you want in Illutrator. When I need to find out how to do something, I just go to Google (or some search engine) and type in what I want to do, such as "change colors in image with illustrator" or "add text to image with Illustrator." More than 99% of the time, I can find a site or tutorial or forum where someone else has already asked the same question.
Good luck.
I hope I die before "your" is the official contraction of "you are."
I hope I die before "your" is the official contraction of "you are."