On Collect side, you need a pro plan and above to have access to the DocuSign integration.
To connect DocuSign to Collect, go to the settings / integrations
To request an e-signature in Collect, you need to include an e-signature element in your request. There are two ways to do this.
If you want your recipients to use the same document, you can use DocuSign templates in Collect.
How to add manually documents to be signed.
When uploading documents to sign directly from Collect, you can insert text and signature zones using "auto-place" tabs.
Your envelopes can have 4 different statuses in Collect.