Yay welcome! Sadly I cannot offer you anything about bonding as I only have the one bunny, but there are tons of people here who have bonded bunnies!
She looks adorable! More pics if you can, we can’t get enough of cute bunnies

Hi welcome to BB! You are definitely on the right track by getting her spayed, she will have such a happier and healthier life because of it.

As for the bonding, definitely wait at least a month after her spay minimum before starting bonding. After she is all healed she is not too young to be bonded to another rabbit. The best thing you can do to have the greatest chance of a successful bond is to let her pick out the new bunny. Many shelters/humane societies and even breeders will let your rabbit go on “bunny dates” and they can help pick the new rabbit that is the most compatible. The new rabbit needs to be spayed or neutered before beginning the bonding process, otherwise that bunny will be interested in mating and it wouldn’t be a true bond, there’s also a much higher risk of aggression. You also have to be prepared to keep the rabbits separate long term if they are not able to be bonded. I hope this helps give you a little more info on bonding, if you have any questions this is definitely the place to ask them! I chose to adopt a second rabbit and the bonding process went so well. I’m really glad I did, they both are happier having a rabbit companion.

Flemish Giants are so cool! You’ll have to post pictures

Is the file too big perhaps? I know it’s a specific size requirement. http://www.shrinkpictures.com/ I use this a lot to resize pics for forums.

Bonding can be very easy, mine took only a couple days. Normally they take a couple weeks, although it’s not as common sometimes it can take months or in rare cases never at all. It depends (haha sorry I know that’s not very helpful)