A couple points:

1. You should watch Walrus' tutorial videos to learn the overall route. His videos will be much more instructive and useful if you're just starting out. Those are also linked in the Guides section, but I'll link it here too just in case:

https://www.youtube.com/playlist?list=PLDHVijF_KNGxh-VKvdAlSmG6XjWLV04sy

2. As supplementary material, here's a "tier list" of strats. This tier list is solely my opinion, and it represents what strats I think new runners should learn / attempt first. Lowers tiers are "easier" or "more worth it go for," while higher tier strats are "less worth it" or "riskier." I developed the tier list after seeing many new runners burn out trying to learn strats that are too difficult for most beginners. Sadly, Mirror's Edge isn't the kind of game where you should try to do every strat from the get-go. Anyway, I digress. Here's the tier list—again, my opinion:

https://docs.google.com/document/d/1QVUR2pusYLEbb6jeDwCSuPpz16mzbi3Uq1EYx0SPCfk/edit?usp=sharing