I made that kit as my fourth of fifth batch. Word of caution, use the raspberry extract sparingly or you will be waiting a good long while before it doesn't taste like you got kicked in mouth with raspberries. I think I used 2/3s of the bottle, but I'd start with 1/4 at kegging time and taste it to decide if you want more.
Techniques aren't going to vary much from batch to batch, so you should be good there. As far as kegging, you can carb and dispense with the same CO2 you use for anything else. Beer gas is nice, but it requires a special faucet and other additional expenses. I carb and push all my stouts with CO2.