edit: seeing your older threads on the topic, it seems like you
are very aware that your biology degree doesn't/didn't teach you how to actually work hands on with animals. In this case I think you just need to accept the biology degree is a bit of an accessory at this point and in order to move into that area, you need to get qualifications that are relevant to the role(s) you want to do (you may just need to find any old job to help fund that in the meantime). Alternately, you'd probably want to look at entry level positions that don't have any requirements and/or apprenticeship schemes to get involved in it.
Also I've merged your two threads on the same topic and moved them at least for now to the vet med forum as it seems closest in relevance (and people in this forum might have some ideas too!) - I don't think we have a landbased careers section for some reason
Equally, as I understand especially for zookeeping or working with exotic pets etc, usually pay is below average due to the "passion tax" such that there are enough people who would accept lower pay to do that job which they feel they love, regardless of their actual qualification level or the amount of work they do. You also see this in e.g. the arts and heritage sectors a lot. So needing to undertake those qualifications at cost may be part of the so-called "passion tax" as well.
Keep in mind plenty of students in school are able to organise some work experience when applying to vet med courses etc - although it will be a while yet, getting prepared ahead of lambing season to get work experience lambing may be a good way to get more direct experience working with animals. That may be helpful in getting some experience and/or a foot in the door with a local farm to get further experience. If there are any stables near you, you might also be able to get some voluntary experience doing work there with horses in the same vein?