No need to apologize – there is an art to making effective use of online forums. SNAP is a very large and complex system with a small group of developers, so documentation is often lacking and the forum is an important source of information.
Please look at Error in running mt_prep_snap. “slc.par” and “matlab: Command not found.” - s1tbx / STaMPS - STEP Forum (esa.int) to see if any of the suggestions there apply to your case.