Wait, do people know about the Before I Play wiki?
I have used this for..... at this point easily over 6 years. It's a wiki where there will be low-spoiler/non-spoiler hints about just stuff you would want to know before playing a game.
It's always stuff like.... "Vitality in this game is useless, put your points in everything else first" or "Don't leave the second hub town until you buy X item, it'll become unobtainable."
Lemme pick an example almost everyone will know. From the Animal Crossing New Horizons page, the first tip is:
Nearly everything on the island is movable later, including all buildings and even cliffs and rivers. The main things that are fixed are the stuff on the border of the island (river mouths, beaches, rocks/peninsulae, the dock and the airport) and the resident services plaza, so picking your island layout should be based around that primarily.
That's stellar advice, tbh, given what you'll know about the game 30 hours in instead of 30 minutes.
Not every game is covered obviously and not every piece of advice is good, it's all subjective, BUT..... I look up almost every game I play for the first time, just to keep stuff in mind. The SMT4 page had top tier advice imo.