I am also new to this whole kodi thing , and have been using this website - https://seo-michael.co.uk/ , which is straight forward and has step by step instructions. Its regularly updated with new add ons and news on which ones are dead.
I installed Ares wizard and Add-on installer (via mettle kettle) which makes installing add-ons much easier and less time consuming,it means you just need to select and click ok.
I've only had kodi a couple of weeks , and already the two add-ons that I was using for football have died. While I agree kodi is great , its also totally unreliable and frustrating.