Informations needed for a beginner Validator

Hello Solana Community,

A friend and I bought a powerful computer to mine Chia and we are thinking to upgrade our 64Gb of RAM into 128Gb in order to become Solana’s validator.

My English is not that great and I don’t understand the reward of doing it, can someone explain to me simply, please?

PS 1: I have checked this link but I don’t see anything about rewards there (Validator Information Thread)
PS2 :I have personally some Solana that I am staking on FTX but my friend don’t