Hi Cody, welcome to your first book club! I’m sure you’re going to have loads of fun here.
I use Jisho and sometimes ichi.moe if I want to better understand sentence structure. These days, though, I fully rely on Mokuro because it’s super helpful. There are a few steps involved to set it up, but the thread I linked to here is very helpful. If you’re planning to use Mokuro, feel free to ask any setup-related questions in the thread - people are very helpful over there!
This would be Google Sheets. You can check out the previous ABBC book clubs for an idea of how the vocab sheet would look. For example, the club is currently reading カードキャプターさくら , and they have a vocab sheet for the book - it’s almost always the same format.
I guess the mods may take it down, so probably yes