Good idea for tattoo?

Im a 16 (almost 17) year old boy who's parents have been going through a rough divorce for the past 3-4 years. I have been suffering everyday from depression due to the angriness and always sadness of my mom. For around the same amount of time ago, i saw someone on TV surf for the first time. Instantly, it widened my eyes. From then on watching people surf, as well as the formation of the beautiful waves made me nothing but happy. In other words, watching waves and/or surfers on tv wold postpone my depression until i couldn't watch it anymore. Unfortunately i live in Canada, so i never hae really got the chance to surf I have been wanting to get a tattoo for a while now, and have my parents consent. I now believe the wisest tattoo to get is a small wave on my shoulder blade for the fact that is kept me happy. I will always be able to remind myself of the happiness i had during hard times, when seeing waves. I also see life as a wave. There are ups and downs, but eventually, it will lead you back to shore, the place you want to go. Do you guys think this is a good idea? Or bad? Why?