If I could add a few points, there's just some notes on propagation and miscellaneous stuff that might be useful.
Utrics don't have any roots at all - the whole "root mass" is just a decentralized system of modified stems (stolons), so you basically don't need to worry about damaging it when repotting. A really common way of propagating them is just ripping/slicing chunks off and potting them up, whether by accident or intention. Even the chunk doesn't have visible "leaves" it'll usually sprout them in a week or two.
Some species (especially the ones from sect. Foliosa, like U. praelonga) are easily propagated from leaf cuttings.
Most don't self seed, but the common weedy ones and a few others like U. calycifida do.
Some don't like harsh light (U. calycifida in particular burns really easily), but most are lenient about lighting conditions as you said.
U. livida and U. pubescens might be good ones to add to beginners' suggestions, both are pretty much as easy as U. sandersonii and have their own unique flowers.
Again, thanks for the guide
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