First of all this the wrong section. For all questions that relates to the NBRP, please post them in this
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so you can receive help much quicker from experience roleplayers. Now to answer your question; if you wish to start a battle with a random person (which I assume you meant) you will first make a thread in this section you posted this thread and follow the rules inside this
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. Furthermore, both players need to have an approve and don't need to have training in order to have a battle. Determining a winner is up between you and the person you're going against.
For a better explanation and detail answer to your questions, please read this
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in its entirety if you want a better understanding of the roleplay.