For spotting large areas of black a Q-tip dipped in ink works great. This inking tip courtesy of "The Complete Book of Cartooning" by John Adkins Richardson. Long out of print, it's really worth hunting up, not least for its detailed instructions on inking with a brush.
But don't discount your natural inclinations. Bruce Timm, Frank Cho, and P. Craig Russell all made the calculation early in their careers that when it came to inking they were "no good" with a brush. Timm And Cho do great work with markers and Russell has long been one of the comic industry's most sought-after inkers for his ability with a dip pen.
A trick I learned for defeating the line-width problem with a tech-pen is to weave two lines together. that is, after drawing one line, draw a second line which closely parallels the first while occasionally crossing the first line, then fill in the spaces created by the intersecting lines to create a rhythm of thick and thin passages. An inking veteran showed me this technique.
"Three's so little room for error."--Elwell