With the right partner it's as difficult as changing an outfit. Today you wear pants, tomorrow a skirt.
BDSM is something you can incorporate into your current lifestyle while you and your partner are making choices, do we want strawberry today or chocolate? As other threads have shown, it can be something you keep online, in the bedroom, or incorporate into your daily life.
Now if you are talking about submersing yourself in a 24/7 d/s relationship that's a whole different thing.
When you say "switching lifestyles" what does that mean to you?