OK - as often stated here the rules for Scotland, England, Ireland and Wales can differ but if you want to keep sheep
1. you need to have a holding number - contact your local 'animal health' depatment and they should be able to help you with this
Once you have your holding number - for the land they will be kept on, you will also need a 'flock' number.
Do all that - which should be straight forward you'll be ok - best of luck
Someone with the full rules will probably follow