I’d love to know as well. I’ve been struggling with mine for months now. This little one is the only part that survived from the bigger plant and it has been getting brown on the leaves now
I don't know if this is the problem but apparently ivies are very prone to spider mites. Guess how I found out, yep, mine got them. The leaves were browning and falling off too, so I put it outside. Seems to be doing better. I learned that they can be temperamental.