I know it's easier said than done but try not to worry about the milk flying everywhere. It's a great sign that you have an ample supply.
I used to feed with a cloth nappy or hand towel handy to mop up all the excess milk. I used it to wipe of bubs and my boobs occasionally too because it can all get a bit slippery.
Sometimes someone who is watching us can see better what we need to do. Can you get your DH to help? If he knows how it's meant to look he can help you achieve that.
Congratulations on a pain-free feed. If you've done it once you can do it again (and again and again and again....)