Welcome!!
I work on my people and families using the Relationships view. It works off of the Active person and will display that person’s parents, siblings, marriages and children. Each of these people and families can be edited from within the view and new people added. Select a new active person and the view will change accordingly.
A more visual view is the addon Graph View. It allows you to set the number of generations up and down from the active person. It also has an All Connected button that brings in connected siblings and in-laws, nieces and nephews, aunts and uncles. Individuals and families can be edited in the view. Note: the All Connected is limited to 1000 people.
I use the People view to filter and find a person. Once I make the desired person and make them active person, I will often go the Grouped People view. The Grouped People view has not been filtered. Even though it is working on the same database, each view can be filtered (or not) separately.