Hi Magdalena,
I am also young (29) and was diagnosed with T1 SSC the right side of my tongue. It seemed from one of your posts a doctor seemed surprised that the cancer spead to the lung. From my experiemce it is not uncommon. They found a nodule on my right lung during a PET scan. So far they say it's nothing (too small to biopsy)
There are some other threads on the forum about "who" gets oral cancer. There are lots of us here that do not smoke or drink heavily and yet we have OC. It's no fun but there are so many people here who can help. Knowing you are not alone is a huge support.
Always feel free to ask any questions. We are here to help and support each other as much as possible.
Suzanne