Hello everyone! I'm looking to buy my first DSLR camera. I want primarily to shoot underwater pics, but when I'm not out traveling I'll probably take other shots like landscapes and cities and just experiment, get better at photography. So I actually already have a Canon PowerShot sx500, but I want something more challenging, that I can really learn with. And also I couldn't find any underwater housing for it online. I've looked at the nikon d3300. What do you suggest getting? Hopefully something used, right, that's not so expensive. So what cameras and housings would you advise? If it's possible, given what I'm looking for, I aim for something under $900. Thank you!