One way to get into troubleshooting your beers if you're not comfortable enough in your tasting perception skills is to compare your beer to exisitng samples and styles of that beer. That way you can:
1) determine if the overall flavor profile is what it should be
2) identify off-flavors
3) train up your palate by learning what a classic beer of that style will taste like
Whether you read about off-flavors in our beer reviews, discover one in the beer you’re drinking, or you receive feedback from a judge on your homebrew, you can use those descriptions to understand what might have gone wrong in the beer.