Hey there! Kudos for asking for advice about bonding and the process, its always nice to see someone doing their research and trying to put the best foot forward! 
I am also fairly new to bunny parenting, but my experiences and research has taught me tons! So my advice with the bonding process is to definitely wait until after you get both of them spayed like you said!
But also, wait until about a month after their surgeries. Hormones will take a while to leave their systems. So about a month or so should give their bodies an opportunity to rest, heal, and drain of wacky hormones!
After that, begin the pre-bonding process. This is like the second step to bonding, its very important. Pre-bonding would consist of swapping litter boxes, cage trays, or giving them a fluffy sock or small stuffed animal to get their scents on and then switching them. (just make sure that the stuffed animals dont have any glass/plastic eyes that could be a hazard!)
So for example, lets say you give Enya a fluffy sock and give Keaira one as well. After about a week, switch socks.
Switching litter boxes, cage trays, and items/toys, gives both of them an opportunity to get used to each others scents so they aren’t such strangers! It tends to make them less aggressive or scared of each other because they seem familiar.
After about a month of this, try introducing them to each other in a neutral space. This could be a coffee table, or just somewhere both of them haven’t been before. Start out small! Introductions should be no more than 10 minutes, i would suggest about 5 minutes.
The neutral territory will help with spray peeing or mounting issues, because bunnies are so territorial they wont feel as if their space has been invaded.
Continue this until you see positive signs. This would be (but not limited to) eating next to each other, loafing, flopping down, cleaning each other, and nobody is seriously upset. After the five to ten minute sessions have been successful, you can try giving them more time together. I suggest increasing at about five minutes every few sessions.
Every bunny is different, so just be patient and give them lots of encouragement! I hope i helped!! 