One thing I’ve learned is that the power users (those that care about having their observations ID’d, anyway) have all developed a social network over time. This network would be people who “follow” them and see whatever they submit, or people who “subscribe” to the same taxa or places that they frequent, or people they have commented back and forth with about previous id’s. This speeds up their IDs immeasurably. As a new user, you don’t have that network yet, but all the things you are doing are good steps toward building it. The main suggestion I would make that I haven’t seen here is, go to other poeple’s bumblebee IDs and ask an identifier a question like “what do you use to tell x from y?” (tag them with their name). If they answer, ask them to look at one of yours that you find confusing (give the link). You’ll learn more and start to “meet” more people that way.