Dear Dee,
At the beginning, you may want to "compartmentalize" your life. Must warn you, this is not healthy in the long run, but works in the short term.
For instance, some people break down their friends into groups, such as "activity friends," "work mates," and "school friends," etc.
Ideally, your goal is to present the same way to everyone.
That's why they call it "transition," you are going from 'A' to 'Z,' but with a lot of steps in between.
Hope this helps.
Your friend,
Monica