Welcome! To attempt to answer Acros's question.
The Sarrs and VFT definitely should be the ones removed since they'll need winter dormancy (in the fridge or in a cool basement for example) and the Sarr will get too big. They could be in a terrarium temporarily, I suppose, but would need to be able to be removed easily with minimal disturbance. These are much better suited to growing outside.
The Drosera sp. might be ok, depending on the conditions in the terrarium. It looks like it's mostly in some LFS, which is a good medium for dews. However, as mentioned, the other moss could be an issue if it starts taking over. The lighting, temp/humidity, etc. also matter...so it's hard to say.
Honestly, most people recommend NOT starting out with terrariums. I remember my very first post here was asking for advice on setting one up, and I was immediately told that growing with the "tray method" (or something similar) in individual pots was much preferred unless you are absolutely sure that you are mixing plants with the same requirements. In individual pots, it's much easier to observe growth, tend to problems (e.g. pest infestations), and act accordingly.
Terrariums look really, really nice...and there are great examples from members of TF. But it's generally not the best pathway to success if you're inexperienced. Simpler setups allow for less things to potentially get out of control, if that makes sense.
Just my $0.02 though. Others may disagree