Hi Bee! Practical is a tough one to address, no jewelry is practical ??
Comfortable depends on your finger. I see lovely stacks on ladies that I could never pull off on my smaller finger, don’t have the real estate. I need thinner rings to be able to wear three at one time.
Whether you feel them or they move, see above, same thing, if you put thick bands on a smaller finger, they might be uncomfortable.
Sometimes you need to get a quarter to a half size larger size of your stackers, because generally speaking, every ring you put on makes the space that’s left on your finger larger, so the next ring will be too snug.
One think you can do it purchase cheaper silver rings and play with those! If one is too thick and wide, use it as a RHR. I found that helped me the most as I am able to tell now how thick I can go, which ones look good together, etc. Then if I want to commit to solid gold and genuine stones I know I won’t regret it.
Doing that allowed me to get a solid gold “bead” band in rose gold and I wear that thing all the time! I got it in silver first.
I don’t think all rings look good stacked. There is a bit of a trick to it, one being sometimes the height as it comes off the finger (as in, from your finger upwards to the ceiling), looks better if the stacking rings are all the same height.
But personal preference comes in there too, some love the look of different heights. Some don’t like to mix different metals, some do!
Give it a whirl, try on some at stores too, that can help!