Am electrician and live in a double-wide so I haven’t tinkered with it beyond swapping some devices. Feels good to be able to just do stuff like this, as simple as it is. I was not raised to be very handy so learning all this has been a deliberate process.
Uh, this doesn’t count as a legal, professional consultation and you should always seek a licensed professional when it comes to electricity in your home.
The other feller’s advice is as good as you’ll be able to get off-site.
My process is always (once I’ve adequately mapped the place out) to find the most feasible path I can take with the fewest holes possible. Walls have top plates and bottom plates, if you come into a wall between the studs that’s great but you still gotta get up or down.
And that, my friend, is where the tricks of my trade begin ;)