When I moved from Digg to Reddit, I used to check back on Digg until eventually the content on Reddit became better than on Digg. The same will happen here.
It took me probably less than a month to completely stop checking Digg altogether. Reddit's decidedly less slick interface had me confused and the content wasn't as easy to digest as with Digg, but it didn't take long to completely abandon it. That was like ten years ago.
I guess a small point I'm trying to make is that you shouldn't feel "shame" for checking reddit. You'll adjust and learn to love whichever alternative you choose
To be honest I've settled into using mlem on my phone surprisingly well from Apollo. Obviously I'd rather not have to change at all but if Apollo goes, I'm gone.
There are still some quirks in the app (for example while it lists comment replies, it doesn't seem possible to reply to those directly, you have to go to the comment chain for that), but considering it's version number it's very impressive and totally usable!
Especially in comparison to what we would have to use in the future if we stayed on Reddit.