Hello nightshade
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Drosera falconeri is considered to be a difficult specie to grow in cultivation. They also require a dormancy. If you want some more easy species, i suggest any south africa sundews. D.aliciae, d.capensis, d.natalensis, d.delsiana are very easy beautifull species. And they fit perfectly all your conditions. Nepenthes bellii is a great subject for a terrarium, because its a relative small nep. If you keep the relative humidity over 70%, and temperature between 70 and 95, this plant will thrive under your care. For sure, you cannot grow d.falconeri and n.bellii in the same tank. Falconeri need a way cooler temps in winter. N.bellii + any south africa droseras can be grown together
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Hope this help !