I emailed her when I worked through the blog, and she recommended #8 pearl cotton. I tried 8, and 12, and didn't like either. I much prefer #80 tatting cotton, even though it is twisty and will knot.
I am not a great hand-stitcher, although I am getting better. I needed to work with thicker thread until I got re-acquainted with hand stitching. You may do hand quilting or cross stitch, and have no trouble with sewing thread or tatting cotton. Give it a try, and use what you have on hand. Cotton, as opposed to polyester.
She posted 5 lessons on getting started in needle lace, and takes you step by step through a beginner's leaf. It's how I got started, and you won't have to wait for a book to come in the mail.
You might want to compy and paste her lessons into a word processor and then print them out.
Please understand that this group is for true needlelace, but not for Roumanian point. The latter does have other groups devoted to it, and there are many others who have a presence on the internet. Your interest in beginning needlelace is entirely welcome.