Tommy, welcome to the Irish corner of APUG! It would be nice to see you at the next meeting. I am sure Vincent ("TEX") will suggest some dates soon. No need to bring 4x5 work with you, any analogue prints would be great, but we are a forgiving group, if you just want to pop in and see the crowd.
On the other hand, if you start in 4x5, minus the enlarger, may I suggest you do some contact prints? They can look stunning, and small large format is beautiful.