SHould not a have a problem with this - if BT can supply it your off.
Choose the best value broadband supply you can - use
http://www.adslguide.org.uk
for useful comparisions etc...
As far as a self install goes - again no problem - as all you need to do it to fit what is called a microfilter to your MAIN BT socket - which is spliter - one port goes to the normal phone, and the other goes to the ADSL modem or router.
Normally ISP give you a setup CD - with with then auto config most things.
With regard to the speed the 2Mb link is only very recent, and you may well be restricted by your distance from the main Telephone exchange, but if you have been used to modem dial-up speeds, 512Kb with be a relevation.
All the best
Phil