Buy P2P

You can get P2P either from Centralized and Decentralized exchanges.

Sentinel Foundation recommend using:

• SwapFast: https://swap.sentinel.co built by Leap.

Centralized Exchanges (CEX)

• Kucoin: https://www.kucoin.com/trade/P2P-USDT
• MEXC: https://www.mexc.com/exchange/P2P_USDT

Decentralized Exchanges (DEX)

• Osmosis (best choice!): https://app.osmosis.zone

For a good overview of liquidity and volume you can check out CoinGecko markets.