Исследую Волшебный Остров

Исследую волшебный остров

Утром я приехала в гавань, на лодке. Как только я сошла с лодки и на береге, я увидела много озер, гор, и долин! Я побежала к реке, и плавала. Когда я плавала, я увидела много рыб с разной цвета. После плавать, я посмотрела на карте и позади холмы была - пещера! Я нашла тропу и шла в пещеру. Пейзаж был прекрасный! У острова был даже есть полуостров! Вся день я гуляла по острове, и когда вечер приехал, я вернулась домой. Я желаю что я бы жить там.

My intended translation:

Exploring The Magical Island

In the morning, I arrived at the harbor by boat. As soon as I got off the boat and stepped onto the shore, I saw many lakes, mountains, and valleys! I ran to the river and swam. When I swam, I saw a lot of fish with different colors. After swimming, I looked on the map and behind the hills was a cave! I found a path and went into the cave. The landscape was wonderful! The island even had a peninsula! All-day I walked around the island, and when the evening arrived, I returned home. I wish that I could live there.

This one was really difficult for me to write. I struggle with knowing when to use perfective or imperfective verbs, verbs of motion and also with knowing which grammatical case to use when talking about things in relation to other things. I apologise for the number of mistakes)