We sometimes get reports from learners who are having a hard time typing in the coding editor because their cursor is in a different spot from the characters that are showing up.
That issue is usually due to a bad default font selection for the "monospace font" in the browser settings - it usually means that the default font isn't actually monospace, so the characters don't line up as expected.
See this article for tips on changing the font in your browser. Pick "Courier New" for your monospace font if possible.
Last updated August 13th 2017