Welcome to B&B! I don't share your cultural heritage, but am not sure that I see how an adjustable would be better for bumps. I think that it's in some ways key to learn good technique without the added variable of blade gap choices. Once you have the technique down, my hunch is that the bumps will have resolved themselves. So my recommendation: go with that HD. Once RAD hits you can branch out to some of the turn-to-open (TTO) adjustable stuff.
+1. Excellent words of wisdom from the Gruder. Technique is going to be the key to getting rid of those bumps. I would highly recommend a Merkur HD. The fewer variables you have to work with at the beginning, the easier it will be to improve your technique.
And welcome to B&B!!!!