Once you really start getting into Horizon Forbidden West, you will notice that the map is huge. This means that getting around on foot simply isn't going to be a very viable option. If you don't want to walk everywhere, then you simply need to find yourself a good mount.
To Override a machine, you simply need to find a suitable candidate and sneak up on it. Once you have gotten close to the unalerted machine, hold the triangle button to mount it. You will now be able to easily get around parts of the map using your new mount.
Related: What is Riverbloom used for in Horizon Forbidden West?
You should note that riding a mount doesn't completely protect you from hostile enemies. You will also find that you have to leave your mount behind when going into settlements and while exploring verticle areas.
Your mounts are going to primarily be your way to get from different points on the map with ease. You should also expect to override quite a few machines throughout the game, so practicing the skill around Chainscrape is advised.
For more Horizon: Forbidden West guides, check out Who are Uthid and Vanasha in Horizon Forbidden West?on Pro Game Guides.
I start my day by exploring Teyvat in Genshin Impact and end it after reorganizing my apartment in Final Fantasy XIV. I am a diehard fan of N64 era games and will forever feel betrayed that Megaman Legends didn't finish. Outside of gaming, I have spend my time collecting manga, collecting anime figures, and watching anime with my naked cat.