Personally, I think the difficulty is spot on. Like, you don't have to rush unlike some other Papers-Please-likes, so you have all the time in the world to reassess your choices. And it's only really four things to keep track of: main class, held item (gems, ranged, melee, and grapple/rope), gray clothes, and opposing monster. Well, that's besides the occasional specific thing, like the mimic maps and the Vampire requests, the first of which is early on when things aren't too complex, and the second of which makes things easier, since it's a one-and-done "remove all potions".
I only rarely get potions wrong, and it's really only my perfectionism that's telling me to replay whenever that happens.
You could try making the hint more obvious, but I don't think it's super necessary. No matter how obvious your tips are, people will still get confused. Although I could definitely see a funny moment where the skeleton bro says something along the lines of "If you ever need a refresher on what potions are for what, you can "right click" the bottles... whatever that means." Putting it in a text format could make people see it more directly?