tbh charlie, the jars are a real rip off. and are totally devoid of taste and texture. good for use out and about though as faylisa said.
good things to start with are carrots, sweet potatoes, parsnips, butternut squash....anything that is naturally sweet. babies taste buds are naturally tuned to sweet as BM (and FM) is very sweet.
I was reading a BLW thread the other day and one woman's DSs first ever food at 6.5 months was beef stew!