Your hive looks, from the photo (too far away to be informative, sorry), to be very crowded! Would you like another hive? If so, this one is ripe to split: already in two deeps and stuffed with bees. If you put on a third deep and/or a honey super they may still swarm. Lose the queen excluder they are a PITA!
The solid looking white stuff is likely capped honey, which the bees typically store on the upper corners of brood frames.
If you cut out capped queen cells, the bees are well into their plans to swarm, and may still swarm on you. Without those queen cells, if they swarm, the queen will go off with the prime swarm and you will be left hopelessly queenless. You could buy a queen in that event (if you do not capture your own swarm, hive that and then give the left behind, queenless hive some fresh eggs to raise their own queen).
I would encourage you to get a local beekeeper out to look through the hive with you ASAP and ensure you have a queen and eggs in there. They can advise you on best options based on what you find.
But in your shoes, with a hive that crowded, and the swarm impulse so far advanced, I would do an immediate split. It can be as simple as setting up a second hive, and simply dealing out the frames between it and the mother hive...such that each hive ends up with half the brood, half the stores, and one of them will end up with the old queen. The one that does not have the queen will likely get eggs, and can raise another, but you could also pop in a purchased queen the next day. That way you may actually get two honey producers this year.
Let us know how it goes.
Janet