I run a fantasy (American) football league and have been trying to create a spreadsheet that everyone can use to view the current standings, stats, etc.

The format of the league is as follows:
Players: 10-person league
Schedule: 13-week schedule
Standings: Head-to-head matches each week, no BYEs.
*additionally, each week the top 5 team scores get a win, and the bottom 5 get a loss (i.e., there are 10 wins and 10 losses per week)

I use ESPN for to compile the scores and head-to-head results, but need a separate spreadsheet for the alternate rules.

My current spreadsheet (which I completely made up from scratch so please excuse it) has the following sheets:
Sheet 1: Scores. This table lists all the teams in Column1 and their respective scores in Columns 2-14. I simply input the teams' scores on a weekly basis (from ESPN) and then sort the table scores on a weekly basis.
Sheet 2: Top 5/Bottom 5 (2 Tables: A & B). Using the data from Sheet 1, I copy/paste the top 5/bottom 5 names into Table A.
Table A is formatted as follows:
T5 Week 1
Team 1
Team 2
Team 3
Team 4
Team 5
B5 Week 1
Team 6
Team 7
Team 8
Team 9
Team 10
Table B is a function table that counts the occurrences of names in respective sheets. It is formatted as follows:
T5 Wins B5 Losses
Team 1 =COUNTIF(A2:M6,"Team 1") =COUNTIF(A8:M12,"Team 1")

Sheet 3. Overall standings (2 tables: C & D) this includes 2 tables. Table C is the "standings," the total wins and total losses (and column for total points scored to separate ties). The cells are linked to the total wins/total losses from Table D. Table D is a breakdown of those standings. The headers for Table D are:
Teams H2H Wins H2H Losses H2H Ties Top 5 Wins Top 5 Losses Top 5 Ties Total Wins Total Losses Total Ties
Team 1 1 [I input this manually] 0 [manual] 0 ='T5/B5'!B15 ='T5/B5'!C15 0 =SUM(B15+E15) =SUM(C15+F15) 0

Here are my questions:
1) Ideally, I'd like everything in one spot, including schedule, scores, etc. And I would merely need to input the weekly scores into Sheet 1 and then everything else (wins/losses, top 5/bottom 5, standings, etc.) would automatically generate itself. How do I do this?
1A) Is there a way to link data across tables and sheets to a single cell. In other words, I want excel to recognize Team 1 across the entire document, "knowing" that it is all interconnected. My equations in tables B and C are merely simplistic workarounds, but the data isn't really connected.
2) As a dumb lawyer who never uses excel, am I doing anything wrong or not utilizing a feature in excel that would make my life much easier?

I would appreciate any help on this as I'm pulling my hair out trying to figure it out. Happy to provide a link to the google doc if that helps.

Thanks in advance.