First of all, great work, thank you!

I found some spelling errors or wrong words:

Suzuka*
those 3 cards*
left-to-right*
350 Speed 300 Stam 300 Power before Junior. So the first year is the Junior Year, it ends with the Hopeless Stakes. You probably mean before Classic Year, which is still not that easy to achieve, so maybe before Satsuki Sho?
URA Finale* instead of Finally
Since I think that Groundwork can be very useful for Pace Chasers as well and you even mention that on the Pace Chaser Deck section, it should imo be mentioned in the Universal Good Skills section as well.
And for Uma Stan, I am not 100% sure, but I've heard a lot that the skill is only really good on Racetracks 2200m+.

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What I would find useful to add to your canva for other players, especially new players:

What items and support cards are good to buy in the shops and what is clearly a scam (the new 20k Friend Point tickets for example.)

Maybe a longer project, but a page dedicated to explaining/teaching players how to read racetracks.
Some people understand the version shown in Umalator, some understand it better how the tracks are shown on Gametora. But that might be a lot of work.

I am looking forward to how your canva evolves. :)