I'll add just a bit to the lather question; you've already gotten all of the advise you need with the strop.

As has been mentioned a couple of times, try adding a bit more water to the mix...but don't over do it. A few drops at a time until you get that perfect meringue. Second, don't be afraid to really work the lather. Often those new at using a brush and soap will have an acceptable mix of water and soap, but have just not worked the lather long enough.

FWIW,
Ed