In reply to orsc16:
Who are you going with? Anyone more experienced who can help you get into the swing of multi-pitch?
All the following suggestions are classic multi-pitch outings, some in the hills others more or less roadside:
Some of the good long mountaineering routes could be ideal - such as those on the E Face of Tryfan - Grooved Arete, 1st Pinnacle Rib etc. All at about V Diff with typically large stances and short cruxes. More about mileage and having fun in the mountains.
Also in the Ogwen area are Idwal Slabs with the three classic slab routes of Faith, Hope and Charity - all at around V Diff. They are great routes but get v busy on a nice weekend, can be v cold when the sun drops out of sight, and have an 'interesting' descent which many find harder than the climbing! It's not really that bad but you need to know how to move on difficult terrain so make sure you are experienced enough or are with someone who is.
Left Edge mentioned above by someone is a similar slabby route at an easy grade at a less frequented crag but still a good route and feels more remote. It's not far away from Idwal Slabs, in Ogwen area. Might be a good call.
The classic easy multi pitch route in Llanberis Pass is, I suppose, Flying Bittress on Dinas Cromlech at V Diff. You can also have a look at things like Dives/Better Things at HS (one of the best at the grade I've ever done). And look at some routes to aspire to eg. Cenotaph Corner (E1), Left Wall (E2) and Right wall etc.
Over the road in the Pass you might like to have a look at The Cracks at HS on Dinas Mot if the weather is good and the rock dry. It has a reachy final pitch but is steady away other than that (and I think you can avoid the final pitch if necessary). Also a somewhat interesting descent.
You may also enjoy looking at some of the easy multipitch stuff at Tremadog, which is roadside but a little further out from the Llanberis/Ogwen areas. Have a look in a quide at routes like Hail Bebe (V Diff), Christmas Currey (Severe), Poor Mans Peuterey (Severe) and tons of classic VS's. Although it can be a challenge to find the start of the route (they are a bit hidden in trees), you can walk off the top of all of them and the protection on the routes is generally very good. A good place to learn multi-pitching in my opinion.
All for the future even if not this trip.