If you don't want to wait to earn the votes but want to make a proposal for the DAO - you can directly buy the votes and a voting NFT via the site at https://mintable.app/vote.
The price is set from a bonding curve that increases as more votes are purchased - so at the beginning they are the cheapest and at the very end they will be the most expensive.
The starting price is 0.005 ETH per vote.
Go to https://mintable.app/vote
Enter the amount of ETH you want to spend
Agree to the terms and read the documents
Submit the transaction and once it's confirmed you will have votes that you can see on the same page