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Well, it's quite challenging, it's hard but you'll have to read, it's more of an invest, then play to earn.
https://www.splintertalk.io/@angelrey199026/splinterlands-beginner-tutorial-2021-get-started-with-the-game-and-start-collecting-nft-and-earn-some-dec-rewards

Check out this post if you want to begin and play.

Does it mean i will invest hive or physical cash
Thank you

It's the same, if you're bringing in Hive, you'd have to earn or buy it, if it's cash, you'd still have to own and earn it externally. If you go through that post, you can learn more.

Okay Sir
Thank you very much