Mostly, a lot of people waste their energy and time thinking that what others will say if they do something. This problem is faced by every person and many people fail to do many good things in life because they fear the reaction of people. On the other hand, the people who don't care about the reactions of others mostly succeed in their ventures and live a much more relaxed life. We are already suffering from the bad habit of wasting time and the habit of worrying about the reaction of others makes this situation even worse.
We all come into this world with a limited time and when we waste this time, we start wasting our life and lose many valuable opportunities. Moreover, it is the habit of people to discourage others when they themselves can't do a thing so we need to not concentrate on their talks and reactions.
Without proper time management, no person can succeed in life. We can only manage our time when we understand the importance of time. Other People will try to distract us or demotivate us in different ways. So we need to learn to not interact with them and avoid their reactions. One of the best ways to do so is to avoid telling your plans to others.
If you are doing something new and challenging then do share it with others till you become successful in it because otherwise people may discourage you from doing that thing or try to lower your self-confidence. As smart people, we need to guard our time and energy from the influence of bad people.
Now if we can't hide then simply make ourselves hard enough to not worry about the other's reaction. Also, learn to say no to a person who tries to waste your time and avoid spending time with people who try to lower your confidence.
People's reactions will always come whatever you do and they will always try to waste your time and energy but it depends on you that how you save yourself from them. Most successful people have very limited friends because they don't have time to waste on unnecessary things. They also choose those people who appreciate them and fill them with positive energy.
Whereas unsuccessful people are mostly surrounded by failed people who have no respect for their time and also don't respect the time of others.
So next let the people talk and say what they want and don't give it much importance.