I was in the same predicament as you a few years back. I knew I wanted to work with people so chose my A levels based on that. I was swayed towards teaching in the end; 'better money, better hours, more opportunities' (useless family advice based on no experience).
I started my primary school teaching degree but quit after 2 years. It just wasn't for me, I can't pinpoint why but I couldn't envisage it as a career for life. A year later I went back to university and trained to be a mental health nurse and it's the best thing I've ever done.
I now work at a secure forensic hospital and in the three years I've been qualified I've learnt so much. Mental health nursing might seem in a completely different league to what you want to do, but all branches of nursing require many of the same skills.
I work with a diverse bunch of patients. In one hour I might be managing and attempting to deescalate an acutely psychotic patient who is exhibiting aggressive and challenging behaviour. In another, I might be reassuring and supporting a suicidal patient who I've worked closely with to gain trust and build and maintain a therapeutic relationship. At other times I might have to physically restrain a patient who is self-harming and seclude them in order to maintain their own safety. At the other end of the scale, I might be working with a stabilised patient who is ready to be rehabilitated in the community but they require me to teach and support them in developing life skills.
All branches of nursing will require you to build strong relationships with patients and their families, risk assess, spot early warning signs to prevent risk of relapse, make clinical judgements, work autonomously, work with the multidisciplinary team, keep up to date with professional knowledge, use evidence based practice, teach patients (whether it be how to fry an egg or how to inject insulin independently), take some form of responsibility for teaching future nurses. Also you'll need a sound knowledge of medications your administering - what they're for, contraindications, maximum doses etc. Etc. I found all of this so much more interesting and rewarding than teaching. Nursing is an art as well as a science.
I also believe there are many pathways and opportunities for promotion in nursing - primary care, secondary care, community care and each will have their pros and cons in regards to flexibility, shift patterns and working hours. You'll also meet patients/service users from all walks of life.
Training is hard (long hours for no pay, exams, assignments presentations), but if it's something you really want to do you will get through it. It was definitely worth it for me. You have to make this decision for yourself, but one piece of advice from me is, don't base your decision on practicalities.