There are several recommendations to get the bp/w and that might be a good idea. However, I would like you to consider diving more first. The new BC will only add task loading to the dive. As already mentioned, the bp/w will not change your bouyancy issues. The only times you should be adding or removing gas from BC is to compensate for wetsuit compression or tank depletion, all other changes should occur in the lungs. Once I learned this idea it has made my bouyancy much easier. Suit compression occurs mostly in the first 30 ft of depth, so I tend to start inflating with very small increments as soon as my descent rate starts to increase and continue to add gas to maintain a steady descent rate. So when I do reach desired depth I am not descending so fast and have to add so much gas to stop my descent. Adding or dumping gas should be done in very small increments and wait for effect, if not then you become the yo yo. I dive cold water with a thick wetsuit, so I am generally overweighted because the safety stop defines my weight requirement to control a safe slow ascent. At depth I am virtually overweighted and must stop the descent with BC gas additions. Doing so as I descend in small increments controls the descent and allows for the adjustments to take effect before next adjustment. When I reach depth the last adjustment keeps me neutral and I don't mess with BC gas again until ascending or descending more than 10+ft or more. Don't get frustrated, it only adds anxiety and make breathing control more difficult. Understand that you won't be great at it at first, it take time to perfect. I have been diving for several years and still working to get it better. At least now I don't need to touch anything. When you get the bouyancy at a managable level, then get the bp/w and perfect it. The bp/w will grow with you better than a jacket, but you don't need the additional task load right now.
