How do I stop procrastinating in order to get a better version of myself?

Start with identity, not behaviour. The most durable change comes from shifting how you see yourself, not just what you do. Every time you do the thing you said you would even a tiny version you cast a vote for the person you want to become.

Accumulate enough votes and the identity becomes self-sustaining. Design your environment to make the desired behaviours automatic rather than effortful. Progress compounds.