My guide is a little out of date now with the Mid Season Update changes but I think it might be helpful if you want to watch it.
https://www.youtube.com/watch?v=mPRhZVL4oNU
Here's my guide on Solomid if you want it as well:
http://www.solomid.net/guide/show/56b54e4e6ae840d1d1517629
If you just want the combos then:
Standard laning combo pre 6 is Q, W on top of enemy, auto attack, Q, auto attack
Standard laning combo post 6 is Q, wait for Q to come off cooldown, Ult, auto attack, Q, auto attack
Some opponents are hard to mark before ulting to them so instead you can do ult, Q, auto attack, shroud, Q, ult, auto attack
Weave in some E's in there if you can do it without running out of energy. Best Akali FL has a youtube channel up where he only uploads Akali games so you can check out his channel as well for help. I have some Akali videos on my channel so you can check them out if you find them helpful.