hello you may search online on Amazon or Flipkart search navgraha yantra and job yantra you will get appropriate description or search results if you have difficulties drop your email id I will send you link. first you keep yantra definitely it is bigger issue the constant disruption in job stability keeping yantra will help balance so you align yourself with universe number’s vibration. and reason for recommending vishnu was he is the preserver of universe he is the navgraha himself don’t expect any shortcuts that you do once in a while praying he will listen gods are just like our parent’s a child should know how to get agreeing to his parent’s so he gets chocolate keep trying talk to him as your friend and know how to be manipulative of your words to him. also sahasaranam is 1000 words of god’s name this is completely different its just one minute it’s a meditative prayer so one invokes vishnu he brings stability please you are advised to listen daily.