Gender selection position

Good morning Ladies,

This is my first post. I'm TTC with baby#2, I already have a boy and anxiously want a little girl. I've read that certain positions as well as not having an orgasm, or having sex before ovulation can help with weeding out male sperm giving female sperm a better chance. For those that have girls can you share stories, tips, or advice. I know it's a 50/50 chance regardless and nothing is actually guaranteed unless I pay for gender selection but it doesn't hurt to try!

Thanks ☺