Im very confused on both please explain

I have a related list on the Account page layout (see image) that shows the products that are associated with opportunities. (Accomplished via a lookup relationship on the Opportunity Product object) However, it shows the products from ALL Opportunities, and we only want to see these details for closed won Opps. What is the best way to get the products from open or lost Opps filtered out of this list? (We definitely want to use a related list solution and not Assets on the Account object.)

I am  creating a flow where I want to update some field such as status ,new value should be Open 

What should I select to update a picklist field that is Status an Update in to "Open" whenever that flow runs.
:) Thank you .