Yeah...well you'd be better off getting with one of these guys who has teh tools, buying your own tools, or taking it to a competent injection shop. These engines are pretty sensitive to timing, and many people have theirs timed too far retarded. But if you time it to far advanced you can actually damage glow plugs and in severe cases the motor itself. You want to time it to 1.5*ATDC at 1400rpm with the luminosity method or 8.5*BTDC with the pulse method at 2000 rpm. Timing by ear can be effective, but only for those who either have a known correctly timed IDI to compare it to or years of experience working with IDI engines and know what they should sound like. If you are a new IDI guy and get it right by ear you got really lucky.
Or you have someone send you sound clips of one that's timed right - one with the cold start advance on and one with it off.
That's what I did, then when I adjusted mine by ear with the sound clips as something to compare to, I got mine set to 10* BTDC at 2000 RPMs by ear (measured with a pulse adapter & light). Since the spec says 8.5* +/- 2* I figured I did pretty good......
While its true that you can damage your motor if you advance it too far, you have to advance it WAY to far and leave it like that before you're likely to do any real damage.
Obvioulsy if you can get with someone with the tools, or get your own that's the best, but setting it by ear is something that can be done safely....