Buy best sniper rifle I can find w/ a good amount of ammo like 100 rounds maybe, take sniper lessons, pistol w/ silencer + ammo, buy the books like the other guy said or whatever, prob won't need them in my plan. umm get gold or find where gold is located or something, plus read up on ways to blackmail anyone if needed...anything else is trivial and I can prob get later.

Master plan: They believe in all kinds of crazy shit and what not, so basically I set up my sniper spot and just start killing kings... who ever becomes king gets sniped (picture head half blown off) and I just sit there over time until I kill about 4-5 of them. Then I secretly spread the rumors (if not already obv) that some superficial thing (thing invisible thunder gun shot obv) will kill any king that isn't true or belong (they must also show their face or something idk what to do about a king that never goes outside except use the pistol somehow secretly and hide)... wait it out for a few dumb brave souls to be king and snipe them... this goes on until basically nobody wants to be king. I have in the process started becoming friends w/ everyone I can and trying to be a "good person with leadership type qualities." stuff as best as I can... then I will stand up and say I want to not just be your King, but your protector and leader and some shit like that... hopefully they accept me and let me try, if not, I say I will and let fate decide, obviously I won't be sniped and build my body guards and army quickly to protect me from someone thinking they will kill me by other means or something (plus I have my pistol). If dragon lady shows up I will tell her that I would like to join her and ask that she marry me and fuck her big time if she says yes, if she says no, then I will tell her that she must know of the fate that has happened to all the past non-true Kings and I will step down rather than fight and let fate decide ... then snipe her ass obv, lol. Basically, I will walk into the throne without contest, because of their fear combined w/ their believe that I am the true King after I don't get sniped. GG King's landing EZ.