You've been given some sound advice but I want to emphasize the fact that properly executed Mentalism is not the same as doing a Cups & Balls routine; the public knows that the C&B is a trick. With Mentalism however, you want to invoke belief and because of this they will not view it in the same light. . . remember, that lowly little Center Tear literally built a religion and kept it thriving for decades before the magic community ever became privy to it . . . then again, since magic chumps got their mitts on it they've ruined it by treating it as a trick vs. method and likewise, not thinking it through when it comes to effective use that removes the psychological pit fall of said technique.
I've deliberately stated this so as to help you to think a bit; Mentalism requires a great deal of thought and contemplation. You don't just do a bit because you like the idea of it and worse, the ego-centered element of how it will make you look. Rather, you find material that supports your claim -- the ability you have be it Precognition or simply being good at Reading People by way of FACS or NLP, etc. With Mentalism there is but one single illusion-- YOU!
More than any other aspect of the magical arts, Mentalism is reliant on one's ability to perform/present and that presentation MUST BE natural to you and who you are. Unlike a magician or even musician, we can't be "off stage" -- a true mystic is always "on" and the public will put you on the spot with great consistency; especially if you are leaning on or hinting at some kind of Psychic/New Age persona.
My suggestion would be to invest time into both, the Mark Wilson and Tarbell courses in Magic and toss a handful of other tomes into that mix, such as "Magic & Showmanship", the Bill Tarr "Now You See it; Now You Don't" books, "Amateur Magician's Handbook" and probably "Modern Coin Magic" (you will notice that I didn't include Royal Road to Card Magic in that at least a dozen others will mention it -- cards are the biggest addiction in all of magic, use them with extreme caution.)
Learn how to do Magic first and don't worry about keeping up with the Derren Brown crapola and similar trends; establish yourself as your own identity rather than trying to be another clone of something that's already passe. After you've traveled this path for a couple of years and you've seen first hand, the difference in how people respond to you the more you study, practice and rehearse, the better you'll be in making the decision to shift over to Mentalism or stick with the traditional stuff that you've learned to do well.
I pushed big boxes around for over 20 years. Though I dabbled with Mentalism & Seance type work for ten of those years I didn't go into Mentalism full time until my late 30s and early 40s. The point being, I focused on one thing at a time, and after I had "mastered" the one field I shifted to a new arena. It was wonderful because it allowed me to be like a child discovering magic for the first time. I was several years ahead of the current trend (which started in the late 1990's . . . I wrote my first Mentalism/Seance book in 1989 . . . a solid 8 years before David Blaine & Criss Angel) and lucky enough to have direct interaction with some of the greats of the day, most of whom have passed in recent years.
My point is, study the foundation material first and leave Corinda, Annemann and Dunninger alone. . . LEARN YOUR MAGIC BASICS FIRST!
