The Russian letter Ч looks like the digit 4 and sounds like ch in cheese.
Interstingly enough, 4 in Russian is четыре, i.e. starts with the letter Ч.
Ч is always soft regardless of the following vowel.
Practice in syllables
Words with this letter
Unstressed О sounds like А.
Practice with a worksheet
Practice the hand-written Russian letter Ч, as well as the syllables and words listed above, with this worksheet: download the worksheet.