Hi Dirtbabe,
Just a word of caution being in a doorway--if you fall off the rollers, it's kind of like being in pinball machine (I was cautioned by those who experienced this). I set up next to a dresser, or the back of a sofa--so when you start, or need to lean on something, it's easy to put a hand out and still keep upright--and keep the area on the other side clear in case you or the bike have to slide out that way. But always respect the rollers--esp. the front wheel when getting on/off or stopped pedaling to rest/adjust something--if it turns hard, you're going down!

It's worth being patient! Nothing else can teach you balance and using your hips to control the bike like the rollers. I can't yet lift both hands off the bars--but it's a goal. And I put on good music, and usually mute the TV--it's nice to have something to look sometimes. Pending how hard I'm riding or my mood, I sometimes just stare at a spot and focus on the music. But it took some time to get comfortable enough to not look at the wheel vs. roller all of the time. Eventually you'll be able to ride w/out looking down much at all. Getting your water bottle in and out of the cage is a good goal, too!

And put down a towel underneath, as you will drip when you start to sweat!

Happy rolling!