I know you already started, but some races/classes get proficiency or a modifier with weapons. For example:
Elf: Longsword, rapier, longbow, composite longbow, shortbow, and composite shortbow.
Drow: Rapier, shortsword, and shuriken.
Dwarf: Dwarven Axe as a martial weapon, so you don't need an Exotic feat.
Gnome: Light hammer, throwing hammer, and warhammer.
Half-Elf: Martial melee from Dilettante: Fighter, and ranged from Dilettante: Ranger, plus some others.
Divines get their Favored weapon proficiency, such as Olladra granting the Sickle.
There are some oddball items that grant you a weapon proficiency while holding it, though only two come to mind, the previously
mentioned Chimera's Breath / Fang combo.
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When you don't start out with a proficiency you have to train it, may be easier to redo the character and pick what you're wanting,
instead if investing time into something you have to use additional points / feats to get.