Hello PotTzty, I just wanted to as a fellow irish man welcome you to the forum. I'm sure you will find life in Switzerland a whole different experience (in a great way) than living in Ireland or Liverpool. Theres a lot of us Irish moving to Switzerland lately.
If you got any questions re Switzerland pm me if u wish, although in sure if you use the search function you will find that 99% of your questions are already answered.
Unfortunatly I cannot give you advice about accommodation in Lausanne as I live predominantly in Basel. However for flat share try
www.wgzimmer.ch it throws up 33 results for people looking for flat mates.
Best of luck
Travnett