"Hi! this is Ina/ 

I had a good weekend.
I started italki last week,I got many new friends all over the world !
We have talk on italki,and on Skype.
And we become close.
i'm very very fun.and happy!
I ask they many question.
For example,"I heard Canadian usually poor maple syrup on pizza, is it true? "
the question's answer is "NO"
Actually,I feel A bit of a bummer　XD
But very fun. Everyone are kindness for me."

Here's how you can correct this:

Hi, my name is Ina and I had a good weekend. [You can take out the exclimation point (!) to make the sentence smaller you can also but the first two sentences together to make it into one]

I started iTalki last week and made many new friends from all over the world. [English uses words like "and" "but" "so" "if" "then" to put two or more sentences together]

We talk on italki and on skype. We became close. 
I'm very fun and happy. [You only need one "very"]

I asked them many questions. For example, "I heard Canadians usually pour ["poor" means "the person has very little" like "That person is poor". "pour" means to "put something on" like "That man pours tea in the cup"] maple syrup on pizza, is that true?" ["ask" is present tense meaning "now". "Let me ask him a question". "asked" is past tense meaning "earlier". "I asked if he wanted to go"  and "asking" is future tense meaning "later". "I plan on asking him later.]

They said "No" [Is smaller and easier to read] and I felt a bit bummed [meaning you talked to them earlier] but it was fun and everyone was kind to me. [when writting a sentence, you want to make sure the whole sentence is in past, present or future tense. Mixing them up confuses the reader]

I hoped this helped you. If you have any questions please ask.