Learn, get comfortable and proficient with the iron sights. Just you and the firearm need to get to know each other. Can always dabble with optics and other add-ons later depending on need, circumstance, and impulse or social influences.
I don't have any for my pistols. I shoot and/or carry a p220 and p239 most often. Took me a short while to get on target with these two pistols of very different sizes, but I'm glad I got comfy with them as-is so now I can get on (close to!) bullseye first pulls with either pistol, one after the other. I'm also surprisingly close to target (a rock, a shadow) at 50 and even 100 yds with the 220 iron sights when on the rifle range waiting for All Clear. I don't hunt any game that isn't feathered, so all my rifles (AKs) are outfitted without optics. I'm very comfortable with my accuracy at distance with iron on those (7.62, 5.45, .308) as well -- but that's just me.