Too avoid this unpleasant cycle of hesitating on wether or not you should follow someone's advice, plan or service, here is what we suggest you to do: take action and trust the process. We don't have enough time to hesitate on wether or not we should do something. You know why? Because it is at this particular moment of hesitating, changing, switching and not trusting that worriedness arises.
Our internal dialogues can be a very complicated subject to cover based on everyone's biases. Depending on our past experiences, the here and now (aka the present), and our visions/dreams/goals in the future, it can be very easy to feel overwhelmed with all the choices we need to take on a daily bases and all the problems we have to solve. Given all the current distractions and inputs that are thrown at us, "not worrying" seems almost impossible.
But actually, it all comes down to the things we are in control of, and those we are not.
So, what are we really in control of?
According to the Stoics, the circle of control contains just one thing, YOUR MIND. Yup. It is quite simple but surprisingly easy to remember, right?
"Some things are in our control, while others are not. We control our opinion, choice, desire, aversion, and, in a word, everything of our own doing. We don't control our body, property, reputation, position, and, in a word, everything not of our own doing.
Even more, the things in our control are by nature free, unhindered, and unobstructed, while those not in our control are weak, slavish, can be hindered, and are not our own." - Epictetus, Enchiridion, 1.1-2
There is clarity in simplicity after all.