You can do that by:
1. Upload your document.
2. In the signers page, Add the signers.
3. You can click on the button "Add me as a signer" to add yourself to the signers list.
4. Add the annotation field you need to the document.
5. Click on "Sign now".
6. Add your signature to the required fields.
7. Send the document for the rest of the signers to sign.