Yeah guides haven't worked for me I had to piece together a lot of info on him.
First off you need to have a competent team that sets you up for lane ganks at low levels.
Then you need to know the jungle route.
Look up Reginald's route, except the video's old, I find I have to use smite on Lizard at level 1. Basically it's drop 3 boxes liz 2 small golems, kill liz, kill golems. From there you can proceed to wraith camp or jump over to blue.
Best build I find is simply cloth + 5 pots > boots > madred's > wriggle's > sword of the occult > boots of mobility > GA > infinity edge. Went 13-0 as this build, best I've done. He can protect stacks well because decieve is so amazing for escaping, as is his ult.
But remember they're also your offensive damage, everything is a tradeoff with him. His ult nearly doubles his damage so if you can't get the kill without it consider using it offensively instead of saving it for the escape. I see far too many shacos doing this!
Also a Shaco with Wriggles, red, and his ult can easily do dragon in a very safe time span, you better control that MFer for your team and do it often. You can't be ganked because of decieve going through the wall. Hit that ****.
Team fights are some what of a struggle for a starter since you may get focused hard - if you are be ready to deceive out and come back when the going is good. Always try to get in back and kill their squishy fast.