Stil not 100% sure where you want the tutorial on. At least let me give you small walkthrough the application.

Install the application:

Install Docker (assume in your case on mac):
https://docs.docker.com/desktop/install/mac-install/

Start application

In an terminal enter the following command
docker run --rm -it -v ~\store:/app/store -p 8050:8050 --name splinterlands-statistics gamerbeaker/splinterlands-statistics:v0.7.0
Note: Assume you have created an store directory in your home directory else replace ~\store for and other directory on you system

Setup accounts:

browse to: http://localhost:8050/config
Enter one account a the time.
This also pulls first daily information.

Pull season information:

Browse to: http://localhost:8050/season
Pres update seasons. The first time this can take an very long time.

Every Day

When you are done playing splinterlands battles for that day press update daily button.

Every Season

When you have claimed you season rewards is time to update you season statistics by pressing update season

What information can be found where

Home

http://localhost:8050/
Which card do you use most and their winpercentage

Losing

http://localhost:8050/losing
Which card do you lose most against

Card

http://localhost:8050/card
Specific card view which ruleset is this card most used and which which units do use it most often. Also to which unit is losing the most in you battles.

Rating

http://localhost:8050/rating
Shows your rating graphs of you battles and also you win percentage of the day

Nemesis

http://localhost:8050/nemesis
This who you lost most against. and when an opponent is selected also more detail on the battles.

Season

http://localhost:8050/season
Al season information on earning battles and win percentage.
Including the option to generate a hive post on it

Generate hive blog

This generates an hive blog which you can

press generate and wait copy text to an post via this button

Will only appear after generate button is done

Portfolio

http://localhost:8050/portfolio
This page will show you account value.
if you have multiple account here you can also combine them.

Add Investments

Here you can add investments. Lets say you deposit 50$ fiat into the game on an a certain date you can add this here so you can easy see the investment against value of your account.
This is only stored locally in your local store.

Hopes this give you some extra information on how to use it.

Also @viniciotricolor has created a small YouTube video about is only start in an different way with gitpod. but from 1:10 their he shows the application.
Not sure about you language but in this post
@viniciotricolor explains how he has done this.

It's a great tool; I recommend using it locally. Unfortunately, I can't help with that as I have no knowledge of how Mac works. You can try following the instructions given by beaker007 If that doesn't work, another alternative is to use a server via a web browser. In the video, I used an extension based on Chromium, despite its practicality. In Safari, simply type "gitpod.io/#" before the URL, like this:

gitpod.io/#https://github.com/gamerbeaker007/splinterlands-statistic

Clicking the link downloads the dependencies automatically and provides a temporary URL for use. It has its pros and cons. Using Gitpod requires creating accounts on third-party services since it's not possible to create the account in a standard way with email and password. I use the tool locally on my Ubuntu, but I need Gitpod for a solution to a problem I have in generating posts.