Reduce Learn Next Section issue #118

[nelsonic]

• [x] Reduce "what should I learn next?" section to de-clutter and help readers focus.
• [x] Tidy up line length for maintainability.
• [x] Fixed a couple of typos.

[codecov[bot]]

Codecov Report

Merging #119 into master will not change coverage. The diff coverage is n/a.

@@          Coverage Diff          @@
##           master   #119   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           2      2           
  Lines          33     33           
=====================================
  Hits           33     33

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[nelsonic]

@iteles when you get a chance, please review & merge. Thanks! 👍