5. Why am I missing 2 xrp when I'm trading a token?

Similar to signing contracts to interact with daaps on EVM chains, to interact with tokens on the XRPL you have to sign a "trustline" ( bit.ly/TrustLines ). When signing a trust line, 2 xrp will be held in reserves to interact with a token. Once you completely sell your position, First Ledger will automatically remove the trust line for you, giving you your 2 xrp back.