I plan on continuing most of the achievements on my main save file but I have just recently started a new one to get the Joja Co. Member of the Year achievement. Otherwise, yeha
At your first post, getting all the achievements didn't seem so difficult, but this added information made me rethink. It's a huge undertaking. Good luck!
I play on mobile, so no platform icons for achievements, only the in-game stars. Well, if there's a reward for it, I would get that, like the arcade machine for beating JotPK, but that's it.