[HELP]How do I use my mnemonic phrase to generate an account and interact with a contract?

like using ethersjs in evm?  
I have searched a lot of documents, but did not see the corresponding content

```ts
const provider = new ethers.providers.JsonRpcProvider('');
const wallet = new ethers.Wallet('pk');
const signer = provider.connect(wallet)
const contract = new ethers.Contract(contractAddr, abi, signer);
const tx = await contract.min(args...)
```