how early is to early?

my daughter just turned 6 months old on the 7th of October and she’s been crawling for almost 2 months and pulling herself up and cruising along furniture for about 2 or 3 weeks now. she has just started randomly letting go of what she’s holding onto and she will stand on her own? my son was only just started crawling at 6 months but was walking by 9 months. I’m so worried she will walk soon and I’m so not ready for it.