The bad news is that yes, if you want to use LR, you will have to subscribe at this point.
The good news is that LR is dramatically better than it was back then.
But it's also more confusing as well: there are now many different flavors of LR. There is LR-Classic, which is the newer version of what you had. There is Lightroom-Desktop, which is where your images (mostly) reside in the clouds and intigrates with your phone's images when you use Lightroom Mobile. There's also a Lightroom Web where you can access your cloud images (and images you've synced from your Collections from LR-Classic.
I would suggest that you start with the first one as that gives you everything and if you wish more storage, you can add it if you want or if you wish to drop the Classic version you can do that as well.
Please let me know if this helps and if you have any more questions, ask!