Welcome to the Tableau Community it is always exciting to see new users! I would like to ask a couple of things so I can attempt to assist to the best of my ability.
First, the following section in the Tableau product help I believe will greatly assist in some of the filtering options available.
I would also review the Tableau Order of Operations which goes through how and when these filters are applied.
Second, I would suggest including a packaged workbook when posting in the Community if possible as it greatly helps members of the Community better understand the issue and assist!
Hope this helps!