Passive thinking of an INFP-T

I was wondering if this has happened to any of you, because I remember that an INFP person can spend the whole day thinking about doing something but not actually doing it. This is because the scenario feels overwhelming in their mind; they consider all the impossible scenarios, making it seem 1000 times harder than it actually is, and as a result, they don't even try.

This happens to me every day, and I feel like I'm wasting my time and my youth.

Can you give me some advice please?