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.
The way to develop Satipattana and Jhana is described below:

When, bhikshu, this samadhi has been cultivated, well cultivated by you, then you should train yourself thus:
“I will dwell exertive, clearly aware, mindful,
observing [contemplating] &lt; body | feeling | mind | dhamma &gt; the in the &lt; body | feeling | mind | dhamma &gt;,
removing covetousness and displeasure [discontent] in regard to the world.”
Thus, bhikshu, you should train yourself.
When, bhikshu, this samadhi has been cultivated, well cultivated by you, then, you, bhikshu,
THE 1ST DHYANA:
should cultivate this samadhi with initial application, with sustained application;
should cultivate this samadhi without initial application, with only sustained application;
THE 2ND DHYANA:
should cultivate this samadhi without initial application, without sustained application;
should cultivate this samadhi with zest;
THE 3RD DHYANA:
should cultivate this samadhi zest-free;
should cultivate this samadhi attended by comfort;
THE 4TH DHYANA:
should cultivate this samadhi attended by equanimity.

Saṅkhitta (Desita) Dhamma Sutta
Jhana is not that difficult if you have the proper guidance.
For Mahaisi method see this answer.