I can't get my web form and campaign to connect. Problem with Legacy?

So I created my web form under the Legacy heading and my campaign under the main (not legacy) heading. I have 8 or 9 emails and delay timers set up in my campaign. When I went to create an Action on the web form to trigger that campaign, the campaign I created is not there. It looks like I might have to recreate the whole drip sequence in the legacy campaign builder?

For reference, what I’m trying to do is offer visitors to my site a free download if they fill out a lead gen form. In the first email they get the download and then after that they get another 8 or so emails in a drip campaign we’re building.

Thanks in advance for your help