I don't want to hear another Christian (INCLUDING MYSELF!) say they want to be "used by God", or want to "hear God" without being willing to do the "work" associated with it. Not "work" in that it's us who controls/ does it... it's God who gives the opportunity, desire, ability etc.... but "work" in that we are willing to sacrifice... to crucify our own desires and flesh... willing to do what we hear God say... willing to take risks and do uncomfortable things that don't make sense.
John 8:47 He who is of God hears the words of God; for this reason you do not hear them, because you are not of God.”
John 10:27 My sheep hear my voice, and I know them, and they follow me;
If you aren't hearing God... is it possible that you simply don't like what He's saying? If you aren't hearing Him, are you really listening? Do you really know Him... are you really in relationship with Him... or do you just know about Him, and talk at Him?
If you're waiting to be used by God, or for the next assignment... is it possible you haven't obeyed the last thing (or 100) that He told you?
If His commands are to love Him (Matthew 22:37-40), love others (Matthew 22:37-40), make disciples (of all nations) (Matthew 28:18-20), proclaim the Gospel/ Kingdom/ good news (Luke 9:60), heal the sick (Matthew 10:7-9), cast out demons (Matthew 10:7-9), care for the widows and orphans (James 1:27) (and so on...)... are you doing this? Or are you waiting for the "right" opportunity? If you're not doing those where you are, with those you already come in contact with, then you don't need a special opportunity... you've had many.
Joshua 24:15 If it is disagreeable in your sight to serve the Lord, choose for
yourselves today whom you will serve: whether the gods which your
fathers served which were beyond the River, or the gods of the Amorites
in whose land you are living; but as for me and my house, we will serve the Lord.”