I'm of a similar age and I think lots of things come into play.
The fact you have a 'minimal pension' would be a big factor.
So state pension doesn't kick in (for me anyway) until 67, and then would be enough to 'get by on'. How do you feel about 'getting by' as opposed to 'enjoying life' ?
How much are all your bills now - food, groceries, haircuts, clothes, presents, bills for TV licence, broadband, service charge (if in a flat) , council tax, insurances, travel, electricity, gas if you have, water rates, and so forth ?
What would you want to do with your time ? Will that cost ? For example, I want to go on a few holidays before I am too old to do so - but that is money I'm not currently spending so is in addition to regular outgoings. What about the rest of the year - are you planning to do things that cost money ? Or stay in (in which case will your heating bills go up ?)
Then it depends a bit how independent your dc are...... would you like to be able to treat them still to some things ? There's a difference between them being all grown up and being completely independent IME.
A BIG factor for me would be how much you enjoy - through to 'hate' - your job. If the idea of going in to work when you don't actually have to is too much, then you would probably get by on a smaller amount. But if your job is fine, then setting a goal of going in - say 3 years - whilst you save into your holiday fund (or whatever your treat to yourself it) is more bearable.