FIRSTLY, AND MOST IMPORTANT: IF YOU RUN WITH EMULATOR, USE THE GBA BIOS FILE. THIS STANDARDIZES LOADING TIMES TO CONSOLE.

The tutorial:

If you just want to see the route without my drawn-out, bad explanations and with probably better execution, skip to 1:00:55 for a sample run. The route outlined in the tutorial is a basic route that differs somewhat from what you'll see in top runs or the world record. It minimizes difficult strats and is in my opinion the most beginner-friendly. Nevertheless, the sample run still gets 41:43 which would still be a top 15 time as of May 24, 2019. :P

In my opinion, only when you cut the sub-45 mark then you should think about learning more advanced strats.

Videos and guides I mention in the tutorial:

Halodude's goal game tutorial - https://www.speedrun.com/knidl/guide/z816v 7-2 setup guide - youtube.com/watch?v=Rj_nAGE6Hh8 Halodude's Dedede and Nightmare tutorials - https://www.speedrun.com/knidl/guide/z816v (I should mention that you want to hit Dedede with a falling Ball first, like the way I do it, instead of with a jumping Ball first like the way Halo does it in this tutorial. He has since changed to my method which is more consistent)

And that's more or less it! Do join the Kirby speedrunning Discord if you have any questions, we'd be happy to help.