I hope that you enjoyed your dive. Ice diving can be wonderfull. A sunny winters day. Clear water. The blue and green hues of midday sun... Or it can be a cold silted out mess
The risk level depends on many things. Visibility. Sunshine or overcast. Silt. Depth. Equipment. Skills.
If you only ventured a short distance under the ice and used a line and kept the hole visible and were carefull with bearings then the risk was not great. Yet not zero either. It is good that you had a continuous line to the surface. I hope that you also had a mental state that allows you to focus on reeling back in a relaxed manner in case of a violent free flow. If you drop the reel in such a situation, do some nervous kicking, silt up the place and loose bearings, then you're dead. But if you manage to stay calm, ignore the bubbles and just do a relaxed swim back, then you're fine. Properly managed (not slack) surface tended line is much more fun as it allows you to relax and enjoy the site. Especially in shallow muddy ponds. I do use reels at some sites and surface tended ropes at other sites. Using a reel may allow you to dive further from the hole but is a lot more work and less fun unless you do it well. And the risks increase. In darkness you should be proficient in the lost line drill, though I remain sceptical about your/anyones capability of relocating a line from deep soft mud.
There are some hidden dangers in ice diving and one is that the hole is visible from below, not from the side. So if you loose the line/hole and have no surface support, then you actually want deeper to take a look. Looking up may reveal the location of the hole. Shallow is dangerous. If you have surface support then you should stay close to the ice instead, as it is from there the safety diver will locate you and your breathing supply lasts longer there.
Another hidden danger is that if you loose buoyancy control and commence an uncontrolled ascent then you had better to remember that the ceiling is quite hard... And that you'll soon hit it. At speed...
Getting out of the water can also sometimes be 'interesting'. Make a large circular hole and you'll stay there until summer comes
Triangular, square with a narrow canal, star shaped, flower shaped, anything goes as long as you can get ice on
both of your sides. Or a ladder or a handline. The hole should be big enough for both of you though, so making a twenty inch well is not a winner idea.
If you really want to be safe and relax, then you should bring double tanks, even small ones, with two independent first stages and cold water regulators. The compressor must be well maintained to produce dry air, and please do pour the water out of your tanks... It's nice to be able to shut down the bubble machine, and reopen it as needed.
Many many minor (and some major) details have been omitted in this post.
Go locate someone that actually does ice dives and you'll learn a lot.