Does anyone know anything about digital pens. im looking to draw digitally for the first time. I was hoping one of you could tell me what should i look for. Like do some digital pens lag, does size matter, are there black and white and colored ones, will i need a tablet or something.

I wanna use it with my computer. I'm hoping to get some objective answers about what criteria i should use to get one rather than just "well i use..." but if you know your pen is the shit and is affordable please let me know