Student or Learner
"I'd like to know how much is...and if it would be available by August. Also, I'd like to know if..."
In the text above, could I use "still" or "yet" instead of "also"? Which one, please?
No, you can't.
Using 'yet' or 'still' at the beginning of that sentence would suggest a contrast -- similar in meaning to 'despite (that)'.