Nar, my tip for you is to manage your boost for when you need it, like when you are cornering and never let your boost fully drain out, that is the worst mistake you can make since you have to wait for your boosters to close and then re-open.
And my tip is that collect every possible boost from each track... In thunder park, you need to collect all of them or you wont be in top 8. Also I recommend to cut the corner close as possible without hitting into wall.
I think SM is a pretty cool guy, eh builds unicycle-bots and doesn't afraid of anything