Confusion about self improvement, I'm about to lose my mind

I feel like I am losing my mind. I have never been in such a horrible situation before in my life. I usually had trouble with human relationships in my life. I wanted to improve my relationships and also improve myself generally in life. So I started therapy. Also I took advices from people who are good in human relationships. These advices are confusing me even more and I don't know what to do anymore Like I said " thank you " a lot to be kind and my friend said I say thank you too much. I was talking with my therapist and he said I am too punishing towards people and I should be nicer. When I'm too nice, some people said I seem too nice and I should be more tough. When I tried to be a bit more tough, they said I am too rude and I should be more friendly. Now I'm sick of everything and there are voices in my head of many people. I don't know what to do in any situation. I think this is the same with parenting. Right now as the social media says every small thing can lead to a child's trauma, you'd be losing your mind cuz you'll try to do best thing for your child, but you can't success that. Cuz you can't be perfect. Every child therapist or psychologist will say something else in real life and also in social media, contradicting with eachother time to time. You'll never know which one to follow as also there's a chance they might be directing you wrong. Now I am too indecisive that I can't decide smallest thing anymore cuz there are many ways to do something and I don't know which one is true. I'm tired of being called too nice or too rude. Whatever I do is being critisized and I am tired definitely. How will I know what I do is the right thing?