When should I expect to receive my return if it was accepted on 4/17/21

It's probably going to be several weeks, and some folks have been waiting since mid-February.  The IRS is seriously backlogged due to all the new tax laws and extra stimulus filings, as well as unprocessed 2019 returns left over from the COVID shutdown.   Also see:

At least 8 million tax returns are in limbo at the IRS because of the pandemic, delaying refunds (msn.com)

I filed mine in the middle of February and got it this morning