If you need any help with anything SM64, check out Ukikipedia to help yourself out! https://ukikipedia.net/wiki/Main_Page
Here are some quicker links directly to the main runs:
https://ukikipedia.net/wiki/RTA_Guide/120_Star
https://ukikipedia.net/wiki/RTA_Guide/70_Star
https://ukikipedia.net/wiki/RTA_Guide/16_Star
https://ukikipedia.net/wiki/RTA_Guide/0/1_Star
The 120 route doesn't mention a beginner option with choosing to do 100s with poles in DDD. For that, just move DDD100 with reds to after getting Fire Sea done. Getting the sub star unlockes the poles. Otherwise all routes have as many beginner options as possible with very detailed videos and guides.
You can now submit runs to the 602 and 1862 leaderboards under the TA filter if you took breaks for sleep and paused the timer! Rules will be more in depth on the category pages on the leaderboard.