It definitely takes time to learn, but a few months of regular use and I believe I could get just as good with my steam controller/Steam Deck as with a mouse.

It definitely takes time to learn, but a few months of regular use and I believe I could get just as good with my steam controller/Steam Deck as with a mouse. However, I am certainly not a great fps player so the needed skill to catch up isn't as much as it might be for you. But I do believe that if you properly learn flick stick then you could probably get quite far, with less effort.