On most bikes, neutral is a “half click” above first, where you have to be pretty deliberate to find it.
On mine I sometimes struggle to find neutral when i want it.
Try being firm when you shift into second, and if that doesn’t work, you’ll just have to learn the feel of getting past into second.
All bikes are a bit different, so it’s less about getting good, and more about learning the machine.
Again depends on the bike. I have big feet, so it’s really nothing more than a flick of the ankle to change up, and changing down is a tap similar to tapping your foot to a drum beat.
You never want to take your foot off the pegs / floor boards when operating the controls.