You are going thru an normal transition and it will get better. Senior nurses will agree that there may be many "right" ways to do the same procedure. They may each be OK but some may be preferable. You will always encounter others who think their way is the only way, but you will adapt and find your own path.
If you are working with someone who has a different philosophy or way of doing things, ask them why their way is better than others. You can do this in a non threatening way and learn a lot. I have been a nurse 30+ years and I still learn new techniques and better ways of doing things.
I would steer clear of those who have only their way and are unwilling to listen to options or try new things. They are the ones who will get you into trouble.
There are many "right" ways to tape in IV site, but we all have preferences. So don't worry too much about variations in style, they may all be right.
Some are just more right than others!
You will get to the point where you just want to know what the final outcome needs to be, and you will get there your own way. Just be patient with yourself.