diff --git a/CMakeLists.txt.googletest b/CMakeLists.txt.googletest
index f98ccb4..37b622b 100644
--- a/CMakeLists.txt.googletest
+++ b/CMakeLists.txt.googletest
@@ -5,11 +5,11 @@ project(googletest-download NONE)
 include(ExternalProject)
 ExternalProject_Add(googletest
   GIT_REPOSITORY    https://github.com/google/googletest.git
-  GIT_TAG           master
+  GIT_TAG           main
   SOURCE_DIR        "${CMAKE_CURRENT_BINARY_DIR}/googletest-src"
   BINARY_DIR        "${CMAKE_CURRENT_BINARY_DIR}/googletest-build"
   CONFIGURE_COMMAND ""
   BUILD_COMMAND     ""
   INSTALL_COMMAND   ""
   TEST_COMMAND      ""
-)
\ No newline at end of file
+)
diff --git a/README.md b/README.md
index 71a4257..ffd04df 100644
--- a/README.md
+++ b/README.md
@@ -17,37 +17,55 @@ Each function has a commented section above it explaining the inputs required fo
 
 The primary purpose of the provided software is to be easy to read and educational, reinforcing the concepts in the book. The code is optimized neither for efficiency nor robustness.
 
-## Installation
+## Installation 
 
-### 1. Install Eigen library.
-* On Mac
+### 1. Install Software
+* Eigen Library: On Linux and Mac
 ```console
-foo@bar:~$ brew install eigen
+foo@bar:~$ sudo apt-get install libeigen3-dev
 ```
-* On Linux
+* Eigen Libray: Mac
 ```console
-foo@bar:~$ sudo apt-get install libeigen3-dev
+foo@bar:~$ brew install eigen
 ```
 
-### 2. Prepare build
+* cmake: On Linux
+```console
+foo@bar:~$ sudo apt-get install cmake
+```
 ```console
 foo@bar:~$ mkdir build && cd build
 ```
 
-By default cmake will install our build into the system directories.
-To define a custom install directory we simply pass it to cmake:
+### 2. Download Repo
+* Download Repo:
+```console
+foo@bar:~$ 
+```
+* Extract Repo:
+```console
+foo@bar:~$ sudo unzip 
+```
+
+### 3. Prepare build
 ```console
-foo@bar:build $ cmake .. -DCMAKE_INSTALL_PREFIX=../_install
+foo@bar:~$ mkdir build && cd build
 ```
+
 Or just configure with defaults
 ```console
 foo@bar:build $ cmake ..
 ```
-Building and installing library
+Building library
+```console
+foo@bar:build $ sudo make
+```
+Installing library
 ```console
-foo@bar:build $ make all && make install
+foo@bar:build $ sudo make install
 ```
 
+
 ## Testing the library
 ```console
 foo@bar:build $ ./lib_test