Godot and Unity are pretty comparable in my opinion. Unity is a bit more mature and a lot more popular, but Godot is my preferred engine because it is fully open source and has a node-tree/server based system that resonates with me. If you have experience with Python, then learning GDScript will be a breeze for you. Godot also supports C# from what I understand (and can even be used with other languages through something called GDExtension) but I don’t have any experience with that stuff so I can’t really say if it’s good or not.

If you’re looking for a job you will likely have an easier time with at least some Unity experience under your belt (because it’s extremely common and popular with small and mid-sized studios still), but Godot jobs are becoming more common and Godot experience is both increasingly valuable and also somewhat easily transferable over to Unity, should you need to.