Often starting is the hardest part. Inertia is hard and the act of going from nothing to something is often the single biggest step.
I often find for myself that the ability to start new projects, adventures, or whatever, is a bit like a muscle. If you don’t use it for a while it begins to atrophy and starting new things gets tougher and tougher. However if I just force myself to be disciplined and dive into new things on a regular basis it gets easier and easier with each new thing.
So start something today, no matter how small and start building that muscle. Build a new routine that involves trying something new or starting something small regularly. It makes it a lot easier to make that difficult first step when it is really needed.