Power Platform Community Forum Thread Details

I have 2 list ,list1 & list2.
i have created relationship between 2 list.
i inserted flexible blank gallery and added Distinct('List1,CATTitle) in Item properties & inserted label to display CAT (shown as Gallery1)
now i inserted one more blank gallery and items properties added LIST1 & inserted Label ( to show Subject) & empty dropdown to capture status & date pickers for start & end date.
now i want to edit data as Grid Gallery type and save the records as bulk to sharepoint List2 . and also edit those details in same grid form.
the gallery should load saved data based on login user and should show saved changes when ever open the screen.
how to do this any idea?