The spoiler aspect is challenging. I love the writing in the quests. I believe it's one of the best written RPG's out there. The crafting and ability to make something from resources that you've obtained yourself, in game there isn't any clear direction of how that works, but it feels right. Those two things I try not to spoil and attempt to use locations as I hear about them in the story or from using the in-game UI. For the first playthrough, I try to play this way. I imagine what it was like back in 2007, there was no wiki, people had to figure it out themselves. This game is a cult classic in that people that had that experience still love the game. If I jump into spoiler territory, the game might not mean as much to me. That's why I focus on avoiding spoilers.
You're right. It's challenging. Even the Lumbridge Guide right when you finish Tutorial Island tells you to use the wiki for any information.
The wiki is designed to tell me everything, not filter out things I'd find more fun learning myself.
If I click on mining for example, it shows me the pickaxes, but it's not clear how to craft them. So I visit the wiki and just keep reading & reading. Eventually I find they're not craftable. But then were do I purchase them? So I keep reading & reading. All of that reading contains numerous spoilers I'd rather learn myself. There are somethings like ticks and item tick rates that I'd like to know about. Back to the mining pick example, it's not clear why I'd even want to progress to better picks. I edited the wiki to make sure those tick rates are listed. There's so many questions like that and I have to spoil a large part of the experience by using the wiki. I'll likely never know what it was like for those that first played the game and why they love it so.
outer spire
polar galleon
hoary badger
marsh heath