Hey!
Yes, you can do other workouts alongside the Bodyweight Pilates program but it actually depends on where you are at. Each section of the BWP program has been divided into Core, Upper, and Lower, within the manuals and follow along videos are beginner, intermediate and advanced options for you to start where you feel you're level of fitness it.
You have a variety of workouts to choose from whether you are totally new to exercise or an advanced athlete.
Within the program you will find workout calendars, these can be used to create your weekly workout by incorporating other routines.