Here is the ruleset for the ‘23 worlds, I imagine they haven’t changed much.
I would read this and try to build your routine around what will score you most, and work on consistency and stage presence.
I have no suggestion for what tricks or elements to learn, I am not competitive, and don’t follow the comp scene much at all. My guess anything with the word “meta” in it is likely specifically designed to score high. You get deductions for misses and repeats, so that’s important to consider.
See also: Help me understand the scoring system - #2 by fradiger
And from another site that I cannot mention because they compete with YYE:
Clicks are counted when the YoYo interacts with the string, so keep that in mind. Picture tricks and stuff don’t earn you points.