Allah is the only one who creates all the universe and all the creatures. He doesn’t need and doesn’t have any associate to do all the things.
It is not permissible to pray for sustenance, promotions, asking to be successful in exam, passing a regional election, successful running a business, selling goods, to other than Allah, because this is an act of shirk
In the authentic hadith from Shahihain, the hadith of Aisha radhiallahu’anha , if the person wants to ruqya himself, he does it by combining his two palms, then reciting the verses of the Qur’an whatever he wants.
Not just saying “laa ilaaha illallah” but it is obligatory to know what it means, what are the conditions, what are the principles, what are the consequences, what is the cancellation and all about it