If you want to try the role of Approver in a Vintage-mode Venture DAO, you need a Proposer to cooperate (in Vintage DAO, the Proposer can be any Governor, so if you are the Governor of this DAO, it will be simpler).
Firstly, this Governor needs to initiate an Investment proposal, turn on the Escrow function, fill your wallet address into the Approver column, and enter the contract address of the payback token you provided (such as COIN) and the agreed purchase price into the proposal.
After the proposal is submitted by the Governor of the DAO, you as an Approver can approve tokens on the voting page. When this proposal is successfully passed, a portion of COIN in your wallet (quantity = the amount of the Investment proposal divided by the price) will be escrowed to the escrow contract.
At the same time, if you are the Receiver of this investment (set in the Investment proposal), your wallet address will receive USD (quantity = the fundraising amount entered in the proposal).