u/Agitated_Carpenter55

I'm a moderate house plant collector. I've got a decent variety, ranging from carnivorous plants to the typical orchid, pothos, philodendron etc. I've been wanting begonias for a while and saw these on fb marketplace for cheap and snatched them up! I have a humidifier and a humidity/temp gauge.

Can someone explain the basics of begonia care? Do I need a terrarium? Special fertilizer? I don't trust the Google AI conglomerate answers.

I believe these are Begonia solimutata, begonia rajah, and begonia rex?