Stock Android pushes a Google account really hard, but you can technically avoid it. You won't be able to download any apps from the Playstore until you sign into a Google account, BUT you can download F-Droid from a web browser, and from F-Droid you can download Aroura Store, and get all of your Playstore apps from there.
Or you can just use a degoogled ROM instead, which makes it a lot easier to avoid the Google account by default.
FPIFX is a 2020 target date index fund, which is currently 50% stocks and 50% bonds.
VT is a total world stock market index fund - 100% stocks, 0% bonds.
The answer to this entirely depends on "how far away are you from retirement?" - if your retirement is 20+ yrs away, go VT. If it's like, 3yrs ago, go FPIFX.
For more info see the wiki page on glide paths: https://www.bogleheads.org/wiki/Glide_paths