How do I perform Friday prayer if I miss praying with the Jamat, according to Qur'an and Sunnah?

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.

For your third question, know that it is unlawful to miss praying in congregation if you are able to attend the prayer; for more benefit, please refer to Fatwa 83297.

This is for the prayer in congregation in general. No doubt, however, that attending the Friday prayer in congregation is an obligation on all Muslim men. Whoever neglects to attend it, commits a great sin as the Prophet said: “Whoever misses to pray three Friday prayers out of negligence, Allah puts a seal on his heart.” [Ahmad]

Allah knows best.