Here's a really simple tip for layering claps and adding variation so they sound realistic.
Fill up a whole pad bank with 16 single hit clap samples. If you want them to be realistic it's probably best to skip 808 and other drum machine style clapz.
When triggering the samples use both hands and aim to hit 3 pads with each hand. Completely random pad selection on every hit is the most important factor!
Now record the pads on the 2 and 4 over 8 bars with quantize and full level turned off, aiming to create micro timing differences between pad triggers so they sound natural. Some hitting fractionally early and some late.
Pick and choose your favourite parts and repeat the process until you have enough unique variations with each hit.
By panning the samples around the stereo field they start to come alive. Once your clap composite hits the DAW, play around with reverb, EQ and compression and you can get everything to sound like it was always played together.
To add even more variation you can create velocity switched layers, or use simult to trigger other samples.