It "normally" takes at least four months for the IRS to process an amended return. During the pandemic it has been taking MUCH longer. So do not expect quick results from amending--you will likely be waiting for at least six months or more. When they send a refund for an amended return, it will not be by direct deposit. The IRS mails a check to the address on your tax return.
You can watch for information here:
It will take the IRS 4 months or longer to process an amended tax return.
Go to this IRS website for the status of an amended tax return - https://www.irs.gov/filing/wheres-my-amended-return