How do you say

We’re planning to travel next month. Do you want to come along?

..in Chinese?

我们打算下个月去旅行,你有兴趣一起参加吗?

wǒ men dǎ suàn xià gè yuè qù lǚ xíng , nǐ yǒu xìng qù yì qǐ cān jiā ma ?

How do you say "I intend to learn painting this weekend as a new hobby." in Chinese?