yes, the one handed method is easiest. i agree practice makes perfect and the main thing is to be sure you put them in right, not inside out. make sure your fingers are wet. hold up lens to light, to make sure lens is not inside out, and also to inspect to make sure there are no rips or tears. make sure all surfaces (sink) are clean. also, when i come out of shower, and i dry my hair with towel, i rinse hand off before touching contacts because there may be lint on hand from towel.
i don’t use a mirror, i pull down the skin under my eye, look upward, pat the lens onto my eye and done. to take out, pull down skin and pinch. also, before closing case, just do a double check to make sure both lenses are in there, and not hanging out or fell onto sink or something by accident.
i have been wearing contacts since i was 18, and i am now 44, and i have had almost every possible issue occur with them. i remember back in the day, when i was 18, which was like 1984, the cleaners, the methods to clean and the lenses themselves were so much different. i used to hang out in bars a lot, and being tired and the bars being smoky had such a negative effect on lenses. and then, a pair lasted like one year, so it was a big deal to try not to rip them. now they’re so disposable it’s great.