Step 1 - Java Runtime Environment

To continue any further you need to make sure you have Java Runtime Environment installed (Link)

Step 2 - Install Vanilla 1.7.10

To install forge, you need to have the Vanilla version of the game on your system first

After the profile is created, select it as your active profile and run the game at least once

Step 3 - Install Forge 1.7.10

Now it's time to install forge (Link)

Step 4 - Install Mods

Download the modpack as a zip (Link) (Full Mod List)

Unzip it into your .minecraft modsfolder, you can find it by typing %appdata% in the Windows search bar or going to \C:\Users\-User-\AppData\Roaming\.minecraft\mods

If there is no "mods" folder, just create one, then unzip the modpack inside

Step 5 - Launch & Join

With the forge client is installed, repeat Step 2, but instead of selecting the vanilla release, select the newly installed 1.7.10-Forge release

Boot the bad boy up and make sure everything is working

Join the server at MC.BravoSierra.XYZ

If you have any graphical issues, refer to here