@mrjaekin Glad to here you got it working .
There really is no lower limit that you can stake with, but the less you have, the longer it will take between each stake. Personally I would probably try to collect and stake about 500-1000 Swagbucks, then you will get a couple stakes each day .
If you intended to start with a smaller number,i would recommend using poswallet.com. Its a staking pool service where users deposit their coins, the coins are then combined, then staked at a higher frequency than if the user staked their coins in a solo environment. This type of service allows for a much more consistent stake rate for the average user.