Old organic gardner here...so here is the scoop on composting! You need a 50/50 mix of "brown" and "green" parts. Brown is the carbon base for your compost. Some good browns are dried leaves, hay, COMPLETLY dried lawn clippings, any type of paper from newsprint to old printer/copy paper, bark, wood chips and so on! Greens are easy to come by, fresh grass clippings, uncooked vegi scraps from the kitchen, garden scraps, basically any non-dried plant material...and of course...manure! And here is a big time saver, the smaller your green and brown scraps, the faster this goes! So if you have any way of doing this..weedeater, chipper...do it! It can save you as much as two weeks! Here is how it goes:
You want a section of land about 3 feet by 3 feet...this is about the smallest you want to work with and you'll see why later.
Put down a 3 inch layer of browns, sprinkle LIGHTLY with water and a smidge of dirt..any old dirt. This is basicaly what those compost starters are so don't waste your money on 'em.
Then put down a 2 inch layer of green. You don't want TOO much green because the bacteria that is going to do your work can't handle it...it'll give off an ammonia smell. If you smell this at any time, throw in a few forks of dried leaves and turn. Another sprinkle of dirt but not water, the greens are wet enough.
Just keep doing this until you get a 3 foot pile. Then take a gardening fork and turn/mix everything REALLY well. Give it one last LIGHT sprinkle and let it set. About two or three days later go out and ease back the pile and feel inside. Is is getting warm? Great! That means you have good bacterial growth! This is also why you want such a large pile, it helps hold in the heat and speed up the process. Some piles have been known to reach 140 degrees! Leave it alone for another three days and then go turn it. If it looks dry..give it a light sprinkle of water. You may see these long grey or white threads...those are your buddies the bacteria...you want to promote that growth!
Basically every four days or so, go turn the pile and give it a sprinkle if it is dry. You don't want it soaking wet, just moist. Each time you turn it, the pile will heat up again as bacterial growth spreads. Depending on the size of your scraps when you start...you can have good compost in at little as a month! And as someone stated above...save a bit for your next pile...it'll help fire up the new one!