My pronunciation challenges and goals

After I watched my pronunciation assessment text and the TTP talk show, I thought /l/ of  'fall', /s/ of  'sue',
/th/ of  'though' sounds were inaccurate. Specially I thought /l/ sound in the last of a word was my biggest challenge.
So I wish I could pronounce these sounds more accurately and fluently from my lots of practicing in the Jeff's class. It's my goal!!