How do I do indirect addressing in PIC ASM?
There are no indirect memory access instructions on midrange pics, instead you put the address of the memory location you want to access into the FSR register. And then the value is accessible at the INDF register.

See section 4.4 of the datasheet for your chip.
http://ww1.microchip.com/downloads/en/devicedoc/40044f.pdf