This is an entry to say hi.

Hi, I hope to I'll find people to practice my English with and share different things about my Latin American culture.

Hola Astrid!

Muy bien así, pero mis sugerencias serían:

This is an ('an' se usa en lugar de 'a' frente las vocales) entry to say hi.

Hi, I hope to find people here to practice my English with and to share different things about my Latin American culture.

O, mucho más formal:

Hello, I would like to find people with whom to practice my English, and with whom to share aspects of my Latin American culture.

This is an entry to say hi.

Hi, I hope I'll find people to practice my English  with and to share different things about my Latin American culture.