Sophia Learning
Sophia: Illustrative Transition Words: Lesson 1
This lesson goes over illustration transition words and how they are used. It is 1 of 3 in the series titled "Illustrative Transition Words." [2:20]
Other
Saint Michael's College: Semicolon and Colon
This site discusses the three major uses of the semicolon and provides examples for each of the uses. Also discusses the use of the colon.
Grammarly
Grammarly Blog: Commas After Introductory Words
This Grammarly Handbook resource explains how to use commas after introductory elements. Numerous examples of commas after introductory phrases, introductory clauses, and introductory transitions are provided in this resource.