This is a list of links that I have found to be useful in learning Vietnamese coming from English.
I am not associated with any language learning group nor an expect in linguistics. This is just a personal list that I believe would be useful for anybody to benefit from.

Tieng Viet Oi - Vietnamese Lessons
Description: YouTube Channel (Northern Dialect)

Learn Languages
Description: YouTube Playlist (Northern and Southern)

Learn Vietnamese with VietnamesePod101.com
Description: YouTube Channel