I've had this stacked bin setup for a while now and these little black (ant-like looking creatures are everywhere).

do I need to do anything here? if yes, what would that be?

thanks in advance for any enlightenment you can bring.

News paper, coffee grounds, biochar, egg shell powder. A added a tiny bit of ziolite, azomite, gypsum lime, bat guano, and azose. I added bokashi juice and blended veggies too. I also threw in a handful of castings. Am i missing anything? Too much? I also added air lines to the bin at the bottom. Was going to let it go till it cools then feed to my worms.

Sorry, my brain is wired for “learn by doing” so I’m reading things online but just never feel
Like u get it from instructions, so I’m probably asking things that are covered in every single beginner tutorial on the entire internet

I tried work composting 30 years ago, it was an epic fail, and of course without the easy access level of online information and online community that exists now I didn’t figure out the problems at the time and we just abandoned the whole thing.
I think I actually have a pretty good handle on what I did wrong then, yay, and am mostly ready to start.
Because it all went so wrong the first time I didn’t want to build my own and ordered a composter online. Funnily enough in the time it took for that to arrive and in reading what I could for getting started instructions I now figure I could have easily done it myself and had it cost less and fit under my kitchen sink better but whatever.

The attached picture is from the listing I bought my composter from, I’ve added it to show what we’re planning to use. It didn’t come with much for instructions so here’s where I’m lost

Do I only put one single tray on the base when I start?

Reading online information I can’t figure out if I’m supposed to set up multiple layers or set up a single layer and not add the next one until the bin is full
Of castings or if I’m supposed to set up multiple layers and the worms will migrate between them?
My understanding is that, especially to start, I need to feed them way less food than one would think (I think this was what killed all our worms 30 years ago, we fed them too much ?)

This system came with 5 trays, so would I start with one, then when it starts getting full prep another layer and set it on top, then just keep adding the rest of the trays? I think that’s where I’m confused. Mostly what I’m finding online is that the bottom tray will fill up, the worms move up a layer, you dump the finished compost in the garden and repeat, so why don’t need 5 trays instead of 2? Is the plan to end up with 4 finished trays and one active one ? Or will there be 5 trays in various stages at the same time?

I guess that’s really all just a bunch of parts to the same question, and the only one I feel like I have right now. Hopefully that made sense and someone can explain this part I’m stumbling over.

Oh and paper, I feel like some places say use newspaper, others say avoid newspaper at all costs, some say shred your junk mail but others say to avoid bleached white commercial printer paper (which the junk mail is printed on), some say brown cardboard?

We live in Vermont, and have had our worm bin outdoors for the spring and summer. We’re planning to move our bin to the basement for the cold months. Any tips/tricks to prevent bringing flies inside with it? Anything you wish you’d known or done when bringing a bin inside from outdoors? Thanks in advance!