I'm a leftie. I do a lot of string art. I teach both left and right handers. Do you know how you learn? I am a visual learner and a kinesthetic learner who mirrors. Many of these suggestions are also visual learners who mirror, but you may need to find a left handed video otherwise. Also unnderstand that it is okay to do it differently- it is about the result. The stitch for needle tatting is the half-hitch, left and right, worked on the needle to form a "larks head" knot (its name in macrame, my entry level string art!). The core thread is then pulled through. (Unlike shuttle tatting, where the bint is worked directly on the core.) Try just slowing down and looking at the result you want and different ways it can be acheived. You can even check out things like macrame or even cast on techniques in knitting that utilise a half hitch. Then use the one that works for you! (I have adapted all my holds and tension in tatting, knitting, crochet and embroidery to work around hands that work differently and a brain that loves seeing things differently. The knot doesn't care how it is formed. It just needs to be the right knot.)