Hi, welcome
First of all, I give you my sincere thumbs up for seeming serious about what you want to achieve. Secondly, ever since the moderator left (about a week or two ago), this forum has lost quite a lot of its original purpose. People started writing in Hebrew a lot more, either because they don't give a damn what the forum's title says, or because they're too thick to comprehend it. Anyway, it'll take a lot more people like you joining this forum in order for it to recover. And a new manager won't hurt, either... You don't have any mistakes in your message apart from the second line where it should be "I'm here TO IMPROVE my English". Other things I spotted in your writing - like not using an apostrophe in words such as "I'm", or not capitalizing - I'll attribute to the fact that this is the internet, and nowadays people become fluent in leetspeek before ever learning proper English. But your English is fine.