Tuesday night I mixed together the ingredients for P.Reinharts WGB starter(I used orange juice instead of pineapple) giving it one quick aeration/stiring before bed. To my surprise I already had quite a bit of bubbles and a mild yeasty smell coming from my starter wednesday morning and by afternoon quite a bit of rising as well, once again stiring it up 3x a day as perscribed by P.R. Thursday morning I came down and I had quite a bit of fluid at the top of my starter and a vinegar-esque smell. so my questions are....

1. Is the vinegar smell I listed normal?
2. Is the liquid at the top normal? I want to assume this is "hooch" but I figured I should ask
3. If I mixed it up tuesday night, should I be proceeding to the next step/phase in the book tonight(thursday) or would it be friday night??

This is my first time doing starter and I just want to make sure I'm getting the right idea. This is quite fun and exciting for me :)

I appreciate your help and time everyone, love this site..:)

-Daniel