You haven't done darkroom work until you've done it in the dark. The work, I mean. It's a great way to build confidence--and efficiency--in your skills. Then, when you get the red light installed, it's all too easy.
One thing to note... since paper is so insensitive to light, I've found that even working in my darkroom (which is really just a 4X5 foot closet) during the day, with light pouring in at the edges and bottom, causes no problems for me as long as I work fast.
For 4X5 trays, I cut the bottom out of some 1-gallon milk jugs and washed them out good. Works great.
Film developer can be used with paper, with some interesting results. Generally, I find the contrast lower (I've used TMax), but I might not be developing long enough. I know Charlie uses a mix of Dektol and D76, at like 110 degrees F, I think LOL.
Also, if you have access to a LF enlarger, you can project paper negatives as long as you use a paper with no markings on the back. I was surprised when I discovered this... Just a bit longer of a development time.
When you get around to it, I've found that I get the best results by storing chemistry in the smallest bottle that will hold the amount required, and filling it with clean glass marbles to keep the air inside the bottle to a minimum. The chemistry lasts longer. I've found this rather important with Dektol stock, so I've got several bottles, each successively smaller, that I pour the stock into as I use it.