Lifespan varies enormously across the hobby. Some species live for a handful of years, while tortoises and larger lizards can live for decades under good care, potentially outlasting the keeper's current living situation, relationship or career entirely. That's not a reason to avoid longer-lived species, but it is a reason to think about who looks after the animal if circumstances change.
Bringing a reptile home for the first time is more involved than picking an animal and a tank. Before any animal arrives, a keeper needs the enclosure itself, a heat source, appropriate lighting, the right substrate, and at least two hides, plus a stable water dish and some basic decor for enrichment. Getting these right, and getting them right before the animal turns up, is what most new keeper mistakes come down to.
You can find out more via Reptile Centre Northampton.
Northampton Reptile Centre's range spans both wooden vivarium-style builds and glass terrarium-style options, and staff who handle these products day to day can talk through which build suits a particular species, regardless of which word ends up on the box. When in doubt, the safest approach is to ask what an enclosure offers in terms of ventilation, size and material, rather than relying on the terminology alone to make that decision.
Anyone new to reptile keeping quickly notices that the words vivarium, terrarium and enclosure all seem to describe more or less the same thing, and get used almost interchangeably across the UK pet trade. That overlap isn't a mistake exactly, but it does confuse more new keepers than it probably should, so it's worth untangling.
The rule of thumb worth keeping in mind is straightforward. If in doubt about husbandry, a care sheet and, where needed, a conversation with staff who handle these species day to day is the right first step. If in doubt about the animal's health, whether that's appetite, behaviour, weight, skin or anything else, the right step is a vet with genuine reptile experience, not a general practice unfamiliar with exotics, and not a forum thread.