Any guide for play this?

Hi! Welcome to the Splinterlands community! For joining a Splinterlands guide, I recommend going through any that are open since it will be easy to go in not needing permission to do so. If none are available, start looking into guilds that need request. Joining their Discord server if they have one will particularly help.

Any coin for trade?

What do you mean by this? Could you specify what you mean? If you want, you can look at Hive-Engine, which is the Uniswap for Hive: https://hive-engine.com/.

I hope this helps!