Feeling Allah Might Be Guiding Me Toward Medicine but I'm Nervous

Assalamu alaykum, could really use some advice, especially from people who've gone through something similar and from those in the UK familiar with the NHS and doctor employment right now. I'm 27 and suddenly thinking about changing careers. I never loved science as a teen so I never considered medicine, but after a recent surgery I found myself inspired. With AI and everything happening in tech, and looking at my desk job, I'm wondering if I want to stay in corporate/tech long-term. I want work that feels meaningful - to go home feeling like I made a difference. I want something practical where I can see the impact, which is why I'm seriously thinking about returning to university to study medicine. I'm eligible for graduate entry medicine. I've also thought about dentistry or moving into health tech. For the past month or so I've been making a lot of dua for guidance, praying istikhara, and speaking to a couple of doctor friends for advice. I emailed my local dentist asking about work experience but they said they don't offer it - maybe that was a sign. I feel medicine might suit me because of the variety, but the main thing holding me back is the current job situation in the UK. Junior doctors are struggling to get into training, locum work is drying up, and it feels like there's less job security. Then I compare that to tech with AI and layoffs and realise nothing is really guaranteed. Also, this would be my second degree so more student loans unless I can fund it myself (though there are NHS bursaries for part of the degree) and I'd go from earning well to no income for about four years. I'd graduate in my 30s and the thought of struggling to find work at that age scares me - though I'm single and have no dependents right now. Still, I feel like Allah is guiding me. I really want this. I messaged a doctor friend for advice; she was busy and kept saying she'd get back to me. After I prayed istikhara and made dua during tahajjud asking for a sign, she replied after two weeks and laid out the realities, pros and cons, and suggested I research thoroughly and work towards it while keeping my current job to see if I truly want it. When I told her about my istikhara and that she replied after my dua, she encouraged me that I have nothing to lose and should apply. A few days later I opened TikTok and the first thing on my For You page said something like “if Allah chooses you to study a certain field, it means Allah sees the ability in you to succeed.” Subhanallah - it felt so relevant. I don't know if it's just coincidence or algorithms, or if it's a sign from Allah to apply. I have the desire but I'm not currently studying, so I wonder if that matters for being chosen. What's really holding me back is how bleak things seem for doctors now and people saying it may worsen. If I started university in 2027, I wouldn't be applying for specialty training until at least 2033, so maybe the picture will improve. Do I take the risk and leave my current career at this age to pursue medicine? I'm terrified of making a mistake and unsure if this is truly Allah telling me to go for it. I also struggle with regret that I didn't choose medicine at 18 and I compare myself to younger people who are already studying. It feels easier and less risky when you're younger. I know I shouldn't dwell on that and that it's ultimately Allah's plan, but I feel like I never ‘tied my camel’ toward medicine before, so how can I know if I'm meant to be in the right career now? Would really appreciate practical advice, especially from UK-based Muslims who know the NHS or who've made late career switches into medicine or other healthcare roles. JazakAllah khair.