My first-year grades dont count towards my final degree classification, so does it matter that I havent done very well?

That depends on what sort of employer youre aiming for. Larger corporate and commercial firms (if you want to become a solicitor) and sets (if youre interested in becoming a barrister) will want a full breakdown of your subjects and grades. They will often look for a consistently strong performance throughout your degree and be concerned about any moderate grades, wherever they appear. Legal aid and high street firms may be less interested in this detail, although its worth recording that youve studied relevant subjects during your degree. Be careful that you havent started as you mean to go on: if you want to pursue a career in law, youll need to up your game.