First time, having problems

Mushrooms aren't a problem, but watch your humidity- if fungi like your grow room, bud rot is a possibility later. Keep below 50%.

Ok. Ill pick up a hygrometer this weekend. Assuming its too high, just normal dehumidifier, right?

Also, gonna start flowering in ~2 weeks. Anything I should do to them now to make the transition to flowering or do I just walk in and turn the lights off one day?

Late edit:

I will probably only flower 2-3 plants, plan to switch them to 5 gallon buckets with fresh potting soil and perlite when I am about to make the change.

Just walk in and change the lighting. Your best bet is to get a timer......your plants will go nuts if you change things around sort of willy-nilly......even 10 extra minutes with lighting can mess them up..... your 12/12/ times should be EXACT and your place should be completely lightproof but with good air flow etc.....otherwise hermies and all sorts of cool things could happen.

Yep, just a normal dehumidifier if your rh is over 50% (I like mine in the 30's......)

And just an aside......flower as many as you can in your space. You're going to spend several months on this project.......go for as much gusto as possible for your work, money and time. ;)

Any advise on covering a door from light coming in?

I would prefer to do it from in the room so that at a glance its no different looking than any other door from the outside.

Bump (on the sealed room question)

Also, found a male today, so I took it out (no pollen released I caught it early :) ) and the roots looked pretty full to the pot, in fact they were hanging into the pea gravel I put in the bottom of the pot...

I would think this means time to upgrade pots. Im going to go to 5 gallon buckets, I think.

I have about another week I want to veg the plant for, then flower for 8-9 weeks. This will be 10 weeks total in the new soil.

Will this be too long for them to be in the same soil? Anything I should do to my next soil mixture to help? More perlite, ect...

Thanks

Stinky!!