Blue Line. I say that because, aside from getting a game over, there's not really a way to "fail" the category. I mean, Any% is just technically "beat the game", but generally people go to Katina/Sector Z, and that can be difficult for new runners.

I'd recommend running Blue Line because, for Star Wolf, there's a built in timer where they'll just leave the planet anyways after a certain amount of time, so you can't really lose and end up stuck on the wrong path. If that happens it brings you to the stage you have to do anyways, Sector X. Also, it's got a lot of potential with sick boss strats, you get to kill Peppy a lot, etc.

If you're looking for resources, there isn't much, other than just talking about what you're doing while you're doing the run. I did a marathon run last week of this category and I think it's got okay commentary, in terms of explaining things. I'll post a link here this afternoon since the marathon channel was taken down due to poor management. Either way, Blue Line I'd say is the way to go, mostly because you don't have to deal with Katina.