do it, once you start, you will be hooked. like everyone said, prefolds and covers are the cheapest. you could also buy fabric scraps andsew them to the middle fabric yourself to spruce them up or dye them, even with koolaid. if mney isnt an issue, then you have to try them to see what works best. i personally swore i would never use fitteds but i now use them exclusively. i totally agree with trying the pack at jillians drawers. i spent so much money trying the different types, then not liking them.
imio, the best aios are bottombumpers. they have a huge lrange so once she fit them around q12 lbs, i see them fittng up to potty learning, or at least close. totally fit like disposables. aios are expensive, an i would never use them exlusively but its good to jhave some for babysitters.
have you looked on diaperswappers.com its great and you will feel much more knowledgable in a few weeks. the only hard part is figuring out a good wash routine for your water, washer, and detergent, but otherwise i find it much easier than disposables. diaperswappers also has a for sale section so you can try things out and save money buying used. if money isnt a problem, check out hyenacart.com for mama made diapers.
remember, know matter what someone tries to tell you, the amount of water used is in no way comparable to the ill effects disposables have on the environment(ESP true bof front loaders). people just say that to make themselves feel better. and if anyone makes a negative comment, remind them SOMEONE has to do something for THIER childrens future.
good luck and i swear, after a month, you will never think of going back.
ETA- i also agree with fleece and wool for the covers. they are so easy to use andcan double as clothing(you might even be able to make your own if you are crafty). and remember, they can last thru children or be resold, so dont think of the startup cost. it will be less than disposables and its great never to worry about running out od diapers.
at 2 months, if he is a good size, i would see if you could go right to mediums. they may be a little big but at 3 months my daufghter was in mediums which should last awhile- some never even use larges.