Finally getting the BBS shaves!

[Birnando]

Congratulations!
Well done!
To answer your questions, tiny bumps I tend to stretch out. Usually just pulling the skin a bit more than usual and I'm ok shaving straight over it.
The second question is harder, it depends on growth pattern and type of skin and jawline.
What i do in that area is to really press my head backwards. That tightens the skin and reduce the curve a little bit, and that is all it takes for me to get it smooth. I would also recommend stretching sideways, that can sometimes make the difference.
Good luck