How do you say

This sofa that I bought three months ago is very comfortable to sit on.

..in Chinese?

这个三个月前买的沙发坐起来很舒服

zhè gè sān gè yuè qián mǎi de shā fā zuò qǐ lái hěn shū fú

How do you say "We are planning to go climbing this weekend to foster our friendship." in Chinese?