Before you invest all that time and effort into making a block, it might be best to get clear on just what type of block you want. Perhaps you know more about this stuff than I'm assuming you do and you are already clear on all of that. But if you ain't, just fire away with the questions.
Again, I'm all for people making new blocks. We could all use more suppliers, and it seems likely that those suppliers will be people who start out as avid hobbyists.