rebuilding the english league system

Im fairly new to the editor and was wondering if anyone could help or give me advice. I am looking to rebuild the english league system from scratch but keeping the same format.. I don't want to make any major changes but would like to be able to fully customise it with thingsvlike prize money, rules etc. Could somebody help me with this project?

Could anyone even just guide me through how to do this? I'd rather learn how to do it but cant find a tutorial anywhere for this. They are sll for adding leagues etc. Please can someone help?