Hey I've decided to start running the game and I'm not sure of what route to take or if there's any specific tech. I'm planning on doing the Easy mode if that makes a difference.

It's been a while since I ran this mode, so I might not remember to include everything notable, here's at least some tips that I can think of.

Other than having auto L-canceling on, wavedash onto platforms and using items enemies drop smart, you should:

Kirbycide against Mario, Save Zelda (so you can use Sheik later), Pit is faster than Mario, go for the 50/50 chance of getting a good mushroom on the first item-box at "the jungle" stage, Use MK > Marth > Ike, do "turn around jumps" with Squirtle on all his levels (as you move really fast by doing so), use Yoshi > Link, Pikachu > ZSS...

There's probably way more things to cincider and that should be remembered, but I can't think of much more at the moment. Usually you can guess what's fast and what's not and you could always use the other runs here as reference.