The guidance in the UK (I think US too) is to begin at 6 months, LO should be able to sit up unaided and be showing an interest in your food. It's not a problem if your LO starts a bit later or doesn't take much in the early days as food before 1yo is for exploring tastes and textures, milk remains the primary food until 1yo and is far more important for your baby.
Have you heard of BLW (baby led weaning)? This is where baby self feeds (usually batons of food large enough to grasp), it's a great way to introduce solids and baby goes at their own pace so you always know it's the right time. Whichever method you choose there is no hurry to start solids, waiting another month would be fine and even then she might not be overly interested.
I actually gave in and gave my LO solids (BLW) at 5.5months as he was screaming so badly for it every time he saw food. He was 13 days over when born so in my mind he'd reached '6 months' anyway.
