Librarian?!

[Madness6539]

Posting for traffic and maybe brutal honesty.

I am 35 years old and currently a full time carer for my dad. I have 2 children aged 14 and 7 years. My dad is getting better and hopefully by next year he will just need minimal help. I've been out of proper work for a few years now due to his caring needs, COVID and then being off with youngest.
All my previous roles have been in schools supporting and admin related. I enjoyed them but now I'm wondering if it's time to use the next couple of years to retrain and think about what I really want to do work wise for the rest of my working years. I don't want to be a teacher or any other support role in a school now, I feel like I want to move on from that. I'm lucky in that my husbands salary covers our bills and some for savings. We are no way rich but I am able to take time to think about what work I'd like to do. I am really looking forward to getting back into work. My husband is fully on board with whatever I want to do.
The thing is, I really want to be a librarian. I've wanted to since I was younger but school work always fitted around my kids etc and life happens.
I'm considering getting a Masters in Library Information Services. Getting a Masters is something I've wanted to do but again always put it off (mostly due to self doubt). I know not all library positions need an actual qualification in Library Services but I would like to get a Librarian role at a university or a big library in London (I'm SE so an option for me).

I'm not sure if this is just a lovely idea that should stay in the fantasy world and I should be more practical etc or if I should just go for it after my dad gets better. It would most likely be a 2026 or early 2027 start.

Is it bonkers? Too niche?
Should I stick with what I know in schools or retrain in something broader to get easier work. Maybe I'm too old to be doing a Masters?!

So please tell me if this is just a silly dream or actually something worth pursuing.

IABU - don't be silly, go back to school work or retrain in something else more worthwhile
IANBU - go for it!

I did a Library Science masters - but it was back in the late 90s. I worked as an Information Manager in industry for about 10 years before I was made redundant. I then moved completely away from the profession and went into teaching. In my experience, jobs were few and far between. I'm not sure about university libraries - the only person I knew who worked in one was also made redundant, as were the two college librarians at the FE college I worked at, they were replaced by non-qualified admin staff (less expensive). From what I've seen Local Councils are closing libraries/cutting hours and not recruiting librarians.

If I had my time again I wouldn't follow the same path.