Sum Values on Same Date and 4 week average forecasting

I really could use some help. I've been struggling through this issue over the last couple of days and am truly at my wits end. Like most I am new to PBI and while having had some great success as new learner, this one has got me completely stumped!!

What I need to accomplish: This data will be placed in a matrix table and would respond to a slicer, and can be also be used in line/bar charts. 

1.) I need to forward forecast on a limited amount of data - 4 weeks (rolling avg) through to Jan 2022 (Slicer to support by week,month,qtr, etc. would be optimal

2.) Once I am forecasted to 2022, I then need to add values that are listed as small incentive/bonus points between the 4 "actual" data points and 2022.

3.) as weeks progress, any calculated value will be replaced by real -actual values. It must continue to roll forward as each week progresses

My data looks like this:

The Matrix currently looks like this:

Thanks in advance for being willing to help. You are truly helping me and I promise to play your kindness forward.