If you want to strengthen your core and get a solid foundation for weight training, then L-Sit is a great choice. L-sit is the starting point for highly advanced exercises such as L-sit to Handstand and introduces you to Parallel Bars.
For a start you need an upper body strength base. To achieve this, prepare yourself with the following exercises:
- Side planks
- Push ups
Then you can move on to specific L-sit progressions that you can see in the following video by Master in Bodyweight exercises Timothy Bell:
- Tucked Knee Raises
- Tucked Knee
- One Leg L-sit