Get your scoped RPC URL
Connect the wallet whose address is KYC-registered on CSB and sign a short message to prove you control it. You'll get a personal RPC URL to add to MetaMask (or any EVM wallet) that shows only your own data — your balance and your transactions — and lets you send. No one else can use it to read anyone else's activity. Access follows your KYC status automatically and can be revoked by the authority.
Then, in MetaMask
Networks → Add network manually → Network name CSB Testnet, RPC URL = the URL above, Chain ID 8555, Currency symbol tRIEL, Block explorer blank. Then import your account and you're live.
Note: your address must already be KYC-registered and txAllowList-enabled by the Identity Authority — otherwise activation is refused and transactions won't go through.