Hi Sue
we bred our first lambs this year, we borrowed an older ram from a friend, he says always use an older ram to younger ewes or older ewes with a younger ram, He went in with them in October, wore a raddle so I noted the dates. We expected our first lambs 13th March, but that ewe didn't lamb until Easter Sunday!
Most importantly, make sure you have someone around if you get difficult births!!
Ours were all fine until the last one, she had a big ram lamb first and needed assistance, my friend came and talked me through step by step, so next time I'm more 'clued up'!
Theres a list of necessary items you'll need, but as long as you have reliable help, go for it, its really rewarding, fascinating if sometimes a little sad, we had a still born, and a rejected lamb, its hard work and I only had 4 ewes!! any questions I'll do my best!