I'm very excited

All my life I've wanted to learn many languages but it is really hard beacause you have to pay a lot of money if you want to, and school only teaches the basics like dog, cat, house and you think you speak English very well but last year I realized that my English was not good enough so I started practising with basic things like watching movies whith with English subtitles, listening to a lot of music in English and Duolingo, that helped me a lot and now I want to speak English 100% that's why I want to make friends here so I hope to improve my English here and then learn another language like Italian or French.

Well written - but it is all in one sentence.  It needs to be separated into about 5 or 6 sentences :-)

Im very excited

All my life Ive wanted to learn many languages but is really hard beacause you have to pay a lot of money if u want to, and school only teaches the basics like dog, cat, house and you think you speak english very well but last year I realized that my english was not good enough so I started practicing with basic things like watching movies whith english subtitles, listening a lot of music in english and Duolingo, that helped me a lot and now I want to speak english 100% thats why I want to make friends here so I hope to improve my english here and then learn another language like Italian or French

'Im very excited' : I'm [short for "I am"] very excited
'Ive wanted to learn many languages' : I've wanted to learn (many) languages
'but is really hard beacause . . ' : but this is really hard because . .
' if u want to' : to do this
'listening a lot of music' : listening to a lot of music

Your English is not bad, but is weakened by a lack of punctuation in your writing. Try to pay more attention to commas, fullstops, apostrophes e.g. I've, I'm, etc.