Practicing in PLA is a good idea and I do it on occasion for geometry...I have never annealed parts. Some parts print better solid using lots of wall and no fill but that's a part specific call - a Small part like this can be printed both ways and tested to see what makes a stronger part.

I will try to find some Cura settings for this

I am in a much different climate from you and I never have wet filament issues - I simply bag (with a desiccant pack) and store on a rack - Sometimes im negligent and leave a roll in a printer for a long time and have never had issues. Im assuming you might not get away with that where you are Dave.