I’m gonna aim for a sub 120 in Super Mario Odyssey by the end of the year. Any helpful hints for a new player?

Welcome!
You should go and ask on the SMO forums/Discord instead, they can help you more easily.

Welcome and good luck on achieving your goal! ⭐

Welcome to the community, and best of luck with your goal!! 
Smallant1 has a playlist of videos to help beginners to SMO: https://www.youtube.com/playlist?list=PLiinoyifvFb64od8RyqPFmVqDrFwkgaa0

If you have any other questions about running the game, I'd recommend asking the SMO forum as Oreo321 said, since you can get help easier that way! Here's the link to the forum: https://www.speedrun.com/smo/forum

Good luck once again on your goal! You got this!

SMO goals

starsmiley

tsuyuame

Oreo321

Lululover

Laika_the_Spacedog

Gaming_64

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