Hi this is Peggy. Here is some good information on transplanting and care of avocado tree. Good luck.
Dig the hole three times as large and deep as the root ball. Once the dirt is dug out, break up the chunks and return it all to the hole. Then dig another hole in the loosened soil about the size of the root ball. Dig a trench around the mature avocado tree.Apr 3, 2018
Transplanting Avocado Trees - Learn How To Transplant An Avocado ...
What zone are you in?
It needs the summer heat.
Looks like you are Zone 9b, just like me. See if these help.
Give it some time to acclimate and you will need to baby sit it until it becomes established.
Here is more:
I happen to live down the road from commercial growers, Highway 126 from Santa Clarita / Castaic to Ventura. That few miles makes a huge difference.
Growing one myself (finally!) as I typically grow and give away as gifts. Keep your fingers crossed! 🌞
This site had tons of info on avocados: https://www.californiaavocado.com/avocado101