Ok, so here are some general points to consider:
- The reasons for wanting to use reusable. Some people want to use them for natural fibres next to the babies skin (e.g. organic cotton), some people want to reduce landfill waste or for sustainability of the planet (i.e. any material type in the nappy is fine)
2. Sustainability of the material. Bamboo is the most sustainable, however it is classed as a semi-synthetic material which some people prefer to avoid (I have no issues with this and think it is the best material). Organic cotton is probably the least sustainable in the way it is grown. There are other materials too (cotton, hemp)
3. Absorbability - bamboo is probably the best but can take ages to dry (recommend having a tumble drier for this one)
4. Type of nappy system. Easiest are one part nappies (these are like normal nappies except they either fasten by poppers or velcro).
Pocket nappies - similar to above but you insert an absorbent core in the nappy
2 part nappies - the nappy and a waterproof wrap on the outside. These are usually the most absorbent and good for use at night, but a bit more effort putting on.
5. Sized nappies or birth to potty nappies? Birth to potty are good because it can keep the cost down as you are only buying one set of nappies. HOWEVER! They do not fit 'birth' to potty - you will need another, smaller nappy for at least the first 1-3 months. You could use disposables, or hire nappies for this period, or some people use muslins (I've never tried this option!)
5. Look of the nappy - is this important to you? Some are bulkier than others/come in a nicer variety of patterns etc
6. Other bits - do you want to use reusable liners (liners are needed to catch the poop) and wipes too? I would recommend this as this keeps the cost down and as you are washing nappies, you might as well wash these bits too. You will also need to consider getting a waterproof bag to put dirty nappies in while you are out and a nappy bucket to store dirty nappies in at home.