Hello SavantAkashik,
we offer details on the Tree of Life and its applications, for example on our YouTube channel, in several lessons of our free online course, where you are also enroled, and there is currently also a live online course on the Mystical Qabbalah that you could join right away - by viewing the recordings of the first seven sessions and participate live via Zoom for the next five sessions:
https://www.boel-mystery-school.org/en/events/intensive_qabbalah_online.html
To apply the Tree of Life practically, it is a good thing to have some background information, rather than just focusing on one aspect like the Divine name of each Sefirah. (I guess that with "mantras", you refer to the Divine name.)
Hope this helps!
In Light
Andrea