If someone prays only to be praised by people and not for the sake of Allah, this is shirk!

I READ A BOOK ABOUT TAWHID, IT STATES DOING A RIGHTEOUS DEED FOR WORDLY GAINS IS SHIRK, WHAT DOES THAT REALLY MEAN AS I ONLY KNOW OF DOING GOOD DEEDS TO SHOW OFF WHICH IS SHIRK

Shirk and its different forms | September 3, 2015 2:57 am
Previous

Whoever makes ablution then says upon finishing: “Subhanaka Allahumma wa bihamdika;, Ashhadu an laa ilaha ila anta, Astaghfiruka wa atoobu ilayk”– it is written in a parchment,then sealed; and is not opened till judgement day. Is this parchment of any value to one who died one of the nullifiers of Islam ? IF NOT IS THERE ANYTHING THAT CAN WITHSTAND SHIRK LIKE SALATUL TASBIH THAT IS AUTHENTIC?
Next

My uncle came to visit us and see my brothers son(a baby ,1 and half a year) crying out loud. at this he (uncle) said the baby is afflicted by the evil eye and he gave us something a flour( or powder) like substance originally made from plant roots as a remedy for an evil eye. which is to feed the baby by mixing with food and drink as well as to make the baby wear this substance around his neck. my uncle give me this substance to give them for their baby by my hand by telling me the procedures, how to use it. yet I do not give them and it is still with me. now my brother is planning to go to my uncles village in order to find a medicine for an evil eye. and if my uncle tells him that he already give it to me that medicine(i.e substance); my brother will really fight with me. First, what is the ruling on this? What can I do plz ? did i give him before he went to the village?