My Chinese and trip to Hangzhou entry.

我叫杰克。我最近成了刚满二十六岁。我以来大约在六个月前在开始学普通话。但，我希望我好多普通话我在普通话方面有提高（sorry，i don't really understand what's the meaning of this sentence）。我想说普通话得很好把普通话说好是因为二个月后我将去杭州。我每天尝试写至少一个句子。

I'm Jack.I've recently turned 26 years old. I've been learning Mandarin for about 6 months. However, I wish I were better at speaking Mandarin. I want to speak Mandarin well because in 2 months I'm going to Hangzhou. I try to write at least one sentence every day.

My Chinese and trip to Hangzhou entry.

我叫杰克。我最近刚满二十六岁。我已经学了大约六个月的普通话。但，我希望我普通话说得更好。我想说好普通话，因为二个月后我要去杭州。我每天尝试写至少一个句子。

My Chinese and trip to Hangzhou entry.

我叫杰克。我最近成了二十六岁。我以来大约六个月前在学普通话。

我叫杰克，我马上就二十六岁了。我已经学了将近六个月的普通话。

但，我希望我好多普通话。我想说普通话得很好因为二个后我去杭州。我每天尝试写至少一个句子。

然而，我想说好普通话，因为我打算两个月后去杭州，我现在尝试每天至少写一个句子。

I'm Jack.I've recently turned 26 years old. I've been learning Mandarin for about 6 months. However, I wish I were better at speaking Mandarin. I want to speak Mandarin well because in 2 months I'm going to Hangzhou. I try to write at least one sentence every day.

My Chinese and trip to Hangzhou entry.

我叫杰克。我最近刚满二十六岁。汉语普通话，我以来已经学了大概大约六个月了前在学普通话，但是我说得不好。但，我希望我好多能够说好普通话。我想说普通话得很好(前边这两个重复了)，是因为二两个月后我要去杭州。我每天尝试至少写至少一个句子。

I'm Jack.I've recently turned 26 years old. I've been learning Mandarin for about 6 months. However, I wish I were better at speaking Mandarin. I want to speak Mandarin well because in 2 months I'm going to Hangzhou. I try to write at least one sentence every day.

My Chinese and trip to Hangzhou entry.

我叫杰克, 刚刚。我最近成了二十六岁了。我以来大约六个月前在学了六个月的普通话, 还是說得不好 ["Still not good at speakingit" is more natural.  If you really want a literal translation of your English, it would be, 不过希望能說得好。但，我希望我好多普通话。我想说普通话得很好因为二个月后, 我去杭州了。我每天尝我至少要试试写至少一行个句子。 Wrong classifier.  What you mean is to singe a single character each day.

I'm Jack.I've recently turned 26 years old. I've been learning Mandarin for about 6 months. However, I wish I were better at speaking Mandarin. I want to speak Mandarin well because in 2 months I'm going to Hangzhou. I try to write at least one sentence every day.