Just migrated from Groove Music Pass to Spotify Premium - How do I now upgrade to Family Premium

[GeoPolitix]

I just did it - moved from Annual Groove Music Pass to Spotify Premium.  I DID take advantage of the Groove-music-only 60 day free trial for Spotify Premium - but here's what I want to do and the question(s) I have:

1. Can I upgrade to Premium for Family AND keep the 60 day Free Trial?

2. How can I do an annual lump-sum payment for Premium for Family instead of the monthly charge?

Thanks