i dunno..
i used to think digging was borin and i left Silan with a lvl 9 in it.
a week after i hitted the ML. there was a Kitin invasion( the last one, just before the receivership).
so, being a noob, i found myself hanging vaguely in fh, bit bored, with all those shiny greenie bubbles around..
i took my pick..made a few holes, then before i noticed, i was digging in fount cos i needed higher q
in my experience, you shouldnt concentrate in diggin at low level, just do it when bored, or need to relax after 2-3 hrs hunt
levels will come easily, as you dont 'aim' to reach one, and soon enough you will have access to all the spiffy skils who make it engrossing