I don't think I've tried Irish Lace... it's done on a foundation if I recall correctly. But when it comes to other doilies, you name it, I've done it! Just like anything else in knitting or crocheting, it's simply doing one stitch after another. IMNSHO, charts are the only way to go for any but the smallest of them, and I keep track of what round I'm on with a post-it. I'm lost without a stack of post-its within reach at all times! Filet lace is super easy, 99% doubles and chains (US terminology), back and forth in rows. My favourite lace doilies are done with size 20 or 30 thread on a .85 or 1.0mm hook. It's like creating your own little (or not-so-little) spider web!