Put your Striker as a target man and give them Pep Talk in all match to make a gool, make him delighed....
Set as Advance Forwards....
Good Luck...heheheh
You clearly stated that you have recently signed him. If his adaptability is low (which is a hidden attribute), it will take time for him to settle in. When this is the case check the pre-match assistant's advice screen and look if the assistant tells Sturridge is having problems blending into the squad. If this is the case, you may find it useful to set match preparation to high for 1-2 weeks and set special focus on teamwork. You can also have a look at assistant's recommedation for Best Position/Player Role from player's report tab. If it does not work, he may be suffering from low form, rest him for 2-3 games and start playing him again. Also have a look at the shots he has missed. If he is right footed and you are playing him on left side, try utilizing him on right side. Lastly, if you are trying him as a lone forward his poor strength and balance will make him an easy prey for your opponents.