Eye-ya, Carmen G.
If the recordings aren't too long, why don't you post a link to them here? Unless the speakers are using very unusual Scouse-specific words, we can all understand Liverpudlians without too much trouble. You don't need a specialist.
Unlike Italy, which has regional dialects which may be virtually incomprehensible to each other, Britain has very little in the way of true dialect. There are actually very few differences in grammar and vocabulary from one region to the next. If you were to write down the words that the Liverpudlian in your recordings is saying, it would probably be nearly identical to what a Londoner or Welshman might say.
The regional differences within Britain are 90% due to differences in accent, and understanding accents is simply a question of practice. No accent is more 'difficult' than any other per se - a Scouse accent just seems challenging because you probably haven't heard it as often as more neutral British accents.
Ta-ra to you, too!