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Wait. Stop. You're over thinking this.
(1) Trimming (NOT shaving) your thatch of chest hair is fine. Start at a long setting with an electric clipper, live with it for a day or so,then go incrementally shorter you're still not happy.
(2) Almost all men grow visible hair on our arms & legs. No one will be surprised to see it on you, so leave it. Trimmed arm/leg hair never looks right: at best you'll look like a try-hard weirdo if you do; at worst, people will think you trim or shave your body because you're a big ol' sissy.
(3) Ignore the advice of opinionated teenaged trolls on this board. Many are uncomfortable with the idea of growing into men, and can't handle the idea of body hair on their contemporaries. YOU, however, are already a man, and must look like one.