Hi. I don't ever write on this forum but your post felt I wanted to. I'm a med student actually studying and seeing psych patients currently. If you want to change honestly definitely go for it. I dabble in some programming (written my own app) and whilst I love programming I love psych and medicine way much more. You will genuinely love it. There are people on my course way older than you - at least by more than 10 years. I was expecting you to say you're 40 or 45 or something but if you're 30 definitely go ahead and do it. You'll regret it if you don't give it a shot, psych is absolutely amazing and if you find you don't enjoy it you can always switch back (it's definitely not for everyone!).