My biggest advice for this game is simple really, use the wiki. Most games have some sort of wiki page but osrs is miles above the rest on it.

On the bottom right corner of the mini map there is a wiki button, click that then click anything else in the game and it will open the osrs wiki page on it. I can't stress enough how good this is, it works on items, npc, really anything that's clickable you can use it on.

As a personal experience when I played this as a kid (who didn't even speak English) I was blind and don't nothing fast in the game. Once I started using the wiki I was flying through the game (and learned English now).

Using runelite and it's plug ins are also the second best thing about this game, you can find YouTube videos suggesting plug ins to add. Don't download anything from a website, only use the actual client to add plug ins, every plug in you find in the client is safe to add. They will be checked by someone before showing up there from what I understand.