motivation is unsustainable. Goal systems are far superior to motivation.
goals fail when there are no systems in place that serve the goals. it is important to create a platform on which to achieve and execute goals.
to work out this system of things , do what means something to you. this means that you can follow your curiosities and find guidance to make them real.
in other words, you may be curious about guitar. go for that lesson, regardless of the emotional space you hold about it. everyone feels the same way - confidence is easy to fake.