First notebook entry: Introducing myself

Hello everyone, I am Dennis, and from Shanghai, China. I'm very glad to meet you here and sincerely hope that we can make a good journery.
Thank you.

You pretty much only forget to add in spaces and capital letters. Everything else, I believe, is grammatically correct. However, I don't think it's necessary to say "here".. It sounds like "很开心碰到你“. I think the sentence I underlined sounds a little strange. It would be better expressed as "and sincerely hope that we can enjoy a language learning journey together", in my opinion. "I" most definitely does not HAVE to be added in before "sincere", just as it doesn't have to be added in before "from Shanghai". If you chose to say "My name is Dennis", you would have to say "and I'm from Shanghai".

First notebook entry: Introducing myself

Hello ,everyone,my name is I am Dennis, and from Shanghai,China. I'm very glad to meet you here and I sincerely hope that we can make a good Journey, thank you. 

你可以写 I sincerely hope that we can have a good time.