im sorry to say this but grow up man, you are 25 years old... time to take hold of your life and make your own decisions on what you think is right (which in this case you are). if you dont want to go then dont go, its as simple as that. you are not 16 years old anymore...you know very well that saying something a billion times isnt going to get you a job but a impressive resume and solid skills that are required in your field will get you a job. so work on improving those instead of hoping for a miracle...
tell your mother that you are not going to go because you do not believe in these rituals, show some courage and tell her that politely and also say that you are working on improving your resume and skills, explain your reasoning in a calm manner and tell her to be patient. im sure she will understand...
get any low level job in your field (or any field for that matter) for the time being so she can at least stop worrying about you... and then try to climb the corporate level from there onwards or work part time and study(bachelors, master etc etc) because if saying om navo shiva 125000 times can get you a job then i might as well say this too so i can become the next peyton manning :lol:
good luck though and let us know how things turn out to be.