Hi mike thomas,
We understand that you want to upgrade Azure Basic Load Balancer to Standard Load Balancer, so just for understanding the steps precisely , please see the link below from Microsoft, hope you will find easy to upgrade.
https://v4.hkg1.meaqua.org/en-us/azure/load-balancer/load-balancer-basic-upgrade-guidance
If you find this answer helpful, please “up-vote” & accept for the information provided , this can be beneficial to community members.
Kindly let us know if you have any additional questions.
Thanks