Flavor wise, what is "happening" in a game of Magic?

I understand that as a mature game Magic inevitably sacrifices flavor consistency for gameplay, but I want to be indulged today.

• Players: powerful planeswalkers/wizards engaged in a duel (apparently no longer accurate?)
• Deck/library: collection of spells in our mind palace that we bring to battle (what about lands?)
• Drawing a card: gaining knowledge? accessing our mind palace?
• Playing a land: ?
• Tapping a land for mana: drawing power from said place?

I'd love to be directed to resources out there that help to answer the potentially endless list of questions. Preliminary digging yielded stuff like this but I was told that older stuff are no longer accurate or have become wishy washy.