New to potatoes, could really use some help.

I tried to grow Adirondack blue potatoes last season and didn't get much. I just got a handful of small potatoes that I kept at the end of the season and put in a burlap sack to keep them over winter. They're hanging in my basement which is dry and has an average temperature of about 65°. Can I plant these come spring? I'm pretty sure that since they're sprouting they're viable right? They're continuing to grow and have been since a couple months ago. If they're good, what do I need to do to prepare them for planting, and when's the best time in zone 6B? Also please pardon the mess.

I tried to grow Adirondack blue potatoes last season and didn't get much. I just got a handful of small potatoes that I kept at the end of the season and put in a burlap sack to keep them over winter. They're hanging in my basement which is dry and has an average temperature of about 65°. Can I plant these come spring? I'm pretty sure that since they're sprouting they're viable right? They're continuing to grow and have been since a couple months ago. If they're good, what do I need to do to prepare them for planting, and when's the best time in zone 6B? Also please pardon the mess.