If you want to watch video over Vacuum, full vacuum and Autovacuum you can watch over youtube: https://www.youtube.com/watch?v=kR6HZjMfseo

There is a utility you can use for Full vacuum which is "pg_repack" you can consider that as well. This utility does the full vacuum and does not lock the table (minimal). https://www.youtube.com/watch?v=vdCPDf3pHKo

There is a whole series for the vacuum and postgres.