How can I build myself up to do more challenging excercises (pull ups, handstands, etc.)?

To build up to more challenging exercises like pull-ups and handstands, start with foundational strength training. Incorporate bodyweight exercises such as rows and planks to strengthen your upper body and core. Gradually increase the difficulty by adding variations or using assistance bands. Set realistic goals and create a routine that includes these exercises consistently. Remember to celebrate small victories and maintain a positive mindset as you progress towards your challenging exercise goals.