It’s certainly possible. It isn’t easy. Living here takes commitment.
There are some things that will make it easier. First of all, remember that Jerusalem is not the only city here. Rents in Haifa are much cheaper. There are other cities with frum communities that are also cheaper than Jerusalem.
Contact the Aliyah Job Center. They can help you find a job as well as give you career counseling and help you write your CV for the Israeli market.
Be prepared to make difficult choices: eat breakfast and walk to work or skip breakfast and take the bus; buy food or medicine; do I really need internet at home; eat or turn on the air conditioner; etc.
There will be things you think of as necessities that you have to learn to think of as luxuries.
But if you are willing to make the commitment, there is no better place on earth for a Jew to live.