you dont check shock absorber oil per se, more look for leaks and confirm it rebounds correctly on that side. (push on strut tower on that side , it should be firm)
shocks (as well as mounts/tyres etc) are all interlinked in terms of getting wheel hop dynamics.
the other thing to look for are 'shiney seating areas' where theres a loose bolt and the item moves around.
i all honesty, youre stuck getting VWR or another competent garage to look at it