Ownership Change - iPod Touch

In 2019, I purchased a new iPod Touch 128 GB. I've loaded a lot of music from my iMac in that time, but recently I've decided to sell it to a friend. He's been using it for a month or so. In the last few days, I've been getting notifications on my iPhone regarding someone using signing into iMessage and FaceTime. The iPod is still registered with Apple under my personal ID.

So, I know how to change the ownership settings, but here is a question. If I go in and change all the information and reset everything under the new owner, can we still load music from my iMac? The new owner is not terribly acquainted with Apple, and has asked me if we can continue to load music or whatever else might be possible from my iMac. He does have a computer, though it is an older PC. He doesn't really want to get into the intricacies of downloading iTunes onto his computer, figuring out how to get music into iTunes and onto his computer, etc.

All input is appreciated. Thanks.