Best Settings and Interlacing

I would call myself "intermediate level." I've done a lot of reseach. But I'm stuck.

I have a Sony HDR XR 520 camera.

After first, I thought 108060i meant I would get 60 frames per second.

It turns out that's 60 fields per second. And I get 30 frames frames per second instread.

I'm ingesting the video without any transcoding and editing in Premiere Pro.

My question: What timeline do I use?

I want to use a 720 timeline to take advantage of scaling up the 1080 video without losing quality.

But I only see 720p timelines. Does that mean I have to deinterlace the video? And if so how?

Can I edit interlaced video on a progressive timeline?

Since the video is 30p, does that mean it's already deinterlaced?

I'm lost. I'm probably not making any sense. But I have done a lot of research. I don't know if I'm asking the right questions.