Don’t worry 😉 and don’t be confused. If you use LGBT or LGBTQ+, it doesn’t matter because both have same meaning. LGBT is a limited to Lesbian, Gay, bisexual and transgender bisexual, whereas LGBTQ+ is open and includes to all sexualities and communities.
People often use LGBTQ+ to mean all of the communities included in the “LGBTTTQQIAA”:
+ Gender Queer
+ Gender Variant
LGBTQ is the more commonly used term in the community; possibly because it is more user friendly! You may also hear the terms “Queer Community” or “Rainbow Community” used to describe LGBTQ2+ people. This initialism and the various terms are always evolving so don’t try to memorize the list. The most important thing is to be respectful and use the terms that people prefer.