[Dreamscarred Press] Need advice about marksman

[swifthunter420]

so i have to 2 questions first can someone explain to me how psionic focus works and second i need help with a outline of what psionic feats i should take? this my first ever psionic character so maybe some help how to use the marksmen? i know its stupid to use a character with a class you dont know crap about but i think with some help ill make it work. any help would be fantastic everyone here is awesome thank you ahead time for the help merry christmas fellow pathfinders good hunting