Answer in Details
You may chant the Maha Mrityunjaya Mantra or simply say "Om Namah Shivaya" with full faith. Offer water (jal) to the Shivling, and ask for his blessings for your career and your children. Trust that Lord Shiva and the Divine Mother are always with sincere devotees, protecting and guiding them.
Keep faith, continue your efforts, and remember Lord Shiva’s teachings of patience, truth, and selfless action. He will surely bless you and your family. Har Har Mahadev!