many plural nouns do end in и. If you look at the tips and notes section of the Plurals lesson, it tells you how endings change between singular and plural for different types of nouns: https://www.duolingo.com/skill/ru/Plurals
Not all nouns that end in и are plural though as it is also the ending of some feminine nouns in the singular dative, genitive, or prepositional case
It is very hard to explain all endings whne asking different questions and using different prepositions. Use the internet to learn when and where to use a certain ending. In russian there 6 'categories' (not really tge right word, but I do not know the right word), how the questions and prepositions with different endings are separated: именительный падеж, родительный падеж, дательный падеж, винительный падеж, творительный падед, предложный падеж.
It is very hard to explain this and I hope you understand me and my explanation and don't understand wrong
If you want to hear better audio for тарелка, you can check Russian викисловар: https://ru.m.wiktionary.org/wiki/%D1%82%D0%B0%D1%80%D0%B5%D0%BB%D0%BA%D0%B0
or Wiktionary in English: https://en.m.wiktionary.org/wiki/%D1%82%D0%B0%D1%80%D0%B5%D0%BB%D0%BA%D0%B0
What I've learned is that it's not the same in Russian to say "Here is x-thing" and "X-thing is here". "Here is" = "Вот", while "is here" = "здесь/тут"
"Here are my plates" = "Вот мои тарелки" "My plates are here" = "Мои тарелки здесь/тут"
("Тут" and "здесь" mean the same thing, only that "тут" is more informal)