What is Kodi?
Kodi® (formerly known as XBMC™) is an award-winning free and open source (GPL) software media center for playing videos, music, pictures, games, and more. Kodi runs on Linux, OS X, Windows, iOS, and Android, featuring a 10-foot user interface for use with televisions and remote controls. It allows users to play and view most videos, music, podcasts, and other digital media files from local and network storage media and the internet.
Source = https://kodi.tv/about/
And it can be downloaded from the "Downloads" section on the source site.
What i presume 99.9% of people use it for and what i presume most reading the thread will be interested in is it's ability to download third party Add-Ons that allow the streaming and downloading of Sports / Movies / TV Shows etc.
Once Kodi is installed there are two main ways to do this that i know of. (a) Download each individual Add On you want (b) Download a Kodi Build which is already set up with a lot of the popular Add Ons and links.
One of the benefits of option (b) is you may find some very useful Add Ons you wouldn't have otherwise known about. While a downside is you may also get a lot of useless Add Ons that when they update regularly slow you down a bit. Although the Kodi Builds are fully customisable, meaning you can delete anything you don't want after install and add any extra Add Ons not included in the Build.
I've been using one called TheBlackboxOSTV which has recently been rebranded to Paradox. A quick Google search of "install paradox build for Kodi" should give you a quick Tutorial for this. Other popular Builds I've heard of are Beast, Nemesis and Wookie - i've not tried any of these but again a quick Google search should provide you with instructions.
Whether you are starting on a fresh install of Kodi or using a Build the method for installing Add Ons is exactly the same. It's basically a three step process of Adding a Source > Adding a Repository > Installing an Add On. Many Add Ons can be found in the same Repo, so once you have installed it once you just need to Install the Add On.
The best site i have found with guides for this is https://seo-michael.co.uk/. It doesn't appear to have a search option on the site itself so i always use Google and then click the Seo-michael link.
Which Add Ons should i use?
Exodus - brand new Add On from the Dev responsible for creating Genesis which was widely regarded as the best Add On for Movies / TV Shows. New Add On appears to do the same but hopefully even better.
Other popular options i;ve heard of for TV Shows / Movies is SALTS or Velocity.
Phoenix - Best Add On out there for Live Sports at the moment. Once installed head to the Valhalla page, then Live TV > Live Games and select which you want, usually in HD.
I hope that's clear and easy enough to understand for a complete Novice. I've tried to keep it simple and not waffle on too much. There's a lot more to it than that listed above but that's a start!!
Any questions hopefully we can post them here and someone on the site will know the answer, or at least where to find it!!