I've decided for a university module, to create a sequencer that triggers home items, like a doorbell for example
Has anyone had a similar project that they just could give me a few tips or things to be careful with as this is the first time I've ever used anything like the Arduino, and I won't lie, I'm pretty much clueless.
Cheers! 
Well a door bell is about as simple as it can get. If you can manage to make an LED light with the input from a switch your about there. Apart from having a relay that operates from 5V TTL which you can buy from Robotshop or your favorite supplier of electronics.
If you need help in getting the code right to make a led come on and turn off with the push of a button let us know and someone will help. After you have the led working and a TTL driveable relay in hand you are as good as golden. You just have to connect the relay in such a way as to close the connection in the same way as your door bell button does.
Take care,
Kevin