docs: Fix a few typos

There are small typos in:
- doc/starting.rst
- test/test_var_view.py

Fixes:
- Should read `various` rather than `variaous`.
- Should read `utilities` rather than `utitlities`.
- Should read `expected` rather than `extected`.
- Should read `differently` rather than `diffrently`.
- Should read `course` rather than `couse`.