[chalcolithic]

>The consonants are easy

I wish. My teachers have no problem telling apart my j and q, but I rarely hear the difference despite all the cosonants in my native language coming in palatalized/non-palatalized pairs.

[rahimnathwani]

I forgot that English speakers often have difficulty with these pairs of consonant sounds in Mandarin:

j / zh

q / ch (the former is further forward in the mouth than 'ch' in English, and the latter further back, with a fully clenched mouth)