we used disposables for the first month then moved on to reusables. i already built up a large stash of reusables when i was pregnant but didn't actually get on with any of them very well, until we switched to all in ones.
basically, an all in one is just like a disposable, shaped the same with velcro tabs/poppers.
inside the nappy you place a liner, i use flushable liners, which are basically thin papery type stuff which "catches" most of the poo.
by my changing station i have a nappy bucket where the dirty nappies are stored.
when i change the nappy i chuck away the liner and pop the nappy in the bucket.
when the bucket is full (every other day) we put them all into the wash - don't need to do anything to them. we put them on a prewash, wash and extra rinse cycle.
when they're in the wash the inside of the nappy unfolds so that it can be washed. when they're all dry you just fold the nappy back together (which takes 2 seconds).
you can use inserts (just an extra bit of material) if zacoiya is a heavy wetter or for night time use. you put the insert inside the pocket of the nappy (where the material is folded into).
AIOs are the most simple nappies in the world, no fuss at all. we're using tots bots easyfit v2 which (remarkably) are sold in tesco! so you could possibly get one from there and trial it?
the only things you need to remember are not to use too much detergent (this will make the nappies leak - trust me) - you should use 1/4 of the normal amount, and always fold down the velcro tabs before you pop them in the wash so that they don't get stuck to eachother!