Within the DAO, navigate to Proposals and submit a Funding Proposal. Every community is unique, so check with them on how they'd like you to fill out the title, description and link for the proposal.
If your proposal passes, the funds will be available to withdraw from your internal balances, which can be found by navigating to your profile page on DAOhaus
Important! Make sure the 'Applicant' is an ethereum address you control, not a centralized wallet, as you'll need to withdraw the tokens if/when the proposal passes. Gnosis Safes are okay as well, though require a bit of advanced transaction building magic, so only really advanced users who know exactly what they're doing should use one. Otherwise, FUNDS MAY BE LOST FOREVER!