The photo shows an R0402 on it. 0805 is definitely doable by a beginner. 0402 though is at the edge of what could be done without a microscope and not something I’d want to touch with beginner gear.
I'd say it's actually easier to remove an 0402 than, say, a 1206. Since it's so small, both pads heat up to the point of melting whether you intended to or not, and then the surface tension takes away the component with the iron tip. No need for any specialized reworking equipment. I think 0805 is the sweet spot for easy hand assembly and rework, though.
> Desolder R615 0 ohm resistor and solder it to R614, or bridge R614 with solder.
It's just a jumper! This is super easy for a beginner because you only need to desolder and then drop a blob of solder.