Congratulations! you may never strap again.
1. Wakeskate shoes are engineered to drain quickly, but you can use any damn shoes you like. I use Asics top sevens, they are mesh with gum soles.
2. The right length depends not only on height and weight, but if you plan to do more technical or wtw tricks (generally, shorter for tech and longer for wtw). Any length between 41 and 43 is good for your build, its all pretty much preference.
3. There are two main ones that I know of, Rubber foam and grip tape. There are also some slight variations in rubber grip materials. I started with rubber grip and ended up switching to grip tape, again, this is just preference.
4. There are wood boards, compression molded (like wakeboards) and hybrids made of various materials and weights. I personally love the Integrity 2005 team model. It has centered weight for more spin control on its center of gravity. This board is 7lbs. You don't want the board too ight because there is a danger of losing it during wtw tricks. Again, you just have to try different boards because it is all personal preference. The Gator Board lineup looks progressive for next year!
Go to wakeskating.com for wakeskate-oriented discussion, there is a large knowlwedge and experience base there. I hope this helps