Allie, don't get too hung up on the detail. I've a big dalek at the top of my garden and all the soft stuff goes in it - veg peelings, overripe fruit, dead flowers, insides of toilet rolls, card egg boxes, kitchen paper. I don't put newspaper in, I find it leaves a cluggy mess, and I don't put grass cuttings. Don't put in anything with protein in it, don't put eggshells, they never break down. The tub will make itself hot if you leave the lid on, I leave mine open sometimes to let the rain in. Slugs seem to find their own way in - but worms are much more valuable, especially the little red ones. I don't bother about proportions, I just stuff it all in.
We've got two bins now - one being filled and one we've just started to use - the compost is lovely. When the compost is used, I'll shut bin 1 and start filling bin 2 again. Good luck!