Sathipathanna mindfulness and Jhana how to do them correctly

1) It is said that doing the technique that Mahasi Sayadaw talks about we can attain awakening. If you know anything about this technique how is it to be done and can it take us to Nibbana. 2) Question number 2: could you describe the sathipathanas and Jhanas and how I should train them. Especially when I hear about Jhanas on youtube it seems something mystical that we normal people cannot attain. Thank you Dhamma brothers.