The only bit of advice that there really is, is to brake drift as sharp as you can.

In a game like Brawl Stars, it's difficult to make an 'any%' category, as there is no end goal

Well, there is already 25 different category extensions, as well as a few people do use inside drifting bikes, if this was made into a category extension, what type races would there be? (e.g. 8 races or 16 races? Items or no items?)

I somewhat agree, but looking at nearly all of the videos of records, pretty much all of them start not as they enter the training cave but later on, when they've gotten too the desired location. They all start when the first shot has been fired, for for this change to happen, nearly all of the records would have to be removed

Your brawler can be any level