congrats!!!! wooohhoooo!!!!
me three, i would extract as soon as it comes into the house....
you asked about mixing the honey from different hives or keeping it separate, i typically don't, everything goes together, unless i have a bloom i am watching, this year it's buckwheat.....those frames or boxes are set aside. i would just mix all that fine honey together!
your uncapping knife....the plain jane freebie..........does it have a serrated blade? or the bread knife, they work good.....get a cake pan. heat up and boil some water, pour it in the cake pan (enough to cover/heat up the blade of the knife) and stick that knife in that hot water to heat your knife up. (doesn't take long). wipe it off with a clean towel, and uncap, sure works better than trying to uncap the frames with a 'cold knife'. just repeat the process with hot water, wiping it off, and changing out the hot water to keep heat on the blade. hope this makes sense?
have fun! ENJOY!!!