What are you wanting the sheep for and how much land do you have/how many sheep do you want? If you are wanting low maintenance then you may be better have someone else grazing sheep on your land in return for the occasional lamb for the freezer which will have been reared on your land, and additional payment depending on how many acres.
Alternatively you could have store lamb to graze the land so that you don't have to worry about lambing/shearing etc.
If you are wanting to get into pedigree breeding then as others have said you need to choose a breed you like and that is suitable for your land/system. Then be prepared to select the keepers/replacements that do best in your system and on your land.
We like our Zwartbles, fantastic tasting lamb, easy placid ewes to have about, easy lambers. Not for everyone though judging by an earlier post, but there is a lot of variation within the breed. We keep ours on a low input upland farm at 1100ft, and whilst they don't all do well up here most do seem to do fine, and it does mean lambs we sell generally go on to thrive in their new homes.