How do I start exercising when I have no motivation?

Start small enough that it feels almost too easy. Commit to just 5 or 10 minutes of movement, because the hardest part is simply beginning. Once you're moving, you'll often continue past that initial goal. Pick something you don't hate, whether that's walking, dancing, or shooting hoops, rather than forcing yourself into a gym routine that feels like punishment. Don't rely on motivation because it's unreliable. Instead, build a habit by attaching exercise to something you already do, like walking after lunch or doing pushups before your morning shower. Motivation usually follows action, not the other way around. After a few weeks of consistency, the habit itself carries you forward even on days when you still don't feel like it.