I keep mine in a gallon pickle jar by the stove until its either full or fruit flies start poking around..
At which point i take it to the outside piles and bury it in them.
I used to worm compost inside, but my wife didn't appreciate that all too much.
i use all
coffee grounds, green clippings, citrus peels, potato/carrot skins.. Basically any kitchen food preparation scraps. We scrape our plates into the trash...
I don't ever add cardboard (the bulk of my piles are oak leaves) mainly because of the inks used in consumer packaging.. I've got
enough stuff in my piles as it is. Toiletry rolls i use for other purposes.