Seems most games that allow people to choose or edit their characters end up having a meta. Be it by a little margin over the rest, or a totally broken OP build that destroys everything else. People will usually be looking for and recommending these same "winner" setups everywhere. PSO2 has a meta for each class and sub as well, but it allows people some freedom to add or remove things to suit their play style.
So my recommendation is, unless completely clueless and willing to play something that is not you, check those builds online but add your own flair and style to them. Perhaps you won't need that +10 to attack but you want to buff your defense or your utility. So don't be shy to deviate a little bit so long as the build remains relevant, but you can also have fun playing with it. Because in the end, the main purpose of a game you play not for profit, is to have fun.