Rule of thumb, if you'll be doing any walking off the bike in the shoes stick to SPD or similar, (recessed cleat and slightly more flex in the sole), if not you may prefer something like SPD-SL, but bear in mind they're not good to walk in.
I use both, and each are easy to get on with IME, but when your starting out the SPD are easier to clip in with as the pedals tend to be double sided, whereas the SPD-SL have a slight knack to them, but it's really not hard.
SPD cleat on the left............................................................SPD-SL cleat on the right
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