you dont need a stylist, it's all a bit much isnt it? 
That's the very definition of floundering in middle age!
I have been in this situation, and a similar body type to you, OP. What I would strongly recommend is not conforming to any perceived ideas about 'menopause'. It doesn't define you and affects us all so differently that using it as a reason to deride yourself or change style isn't always a great idea.
The shops you mention are just fine for all ages, especially Massimo Dutti. I got over this hurdle by dressing for my actual lifestyle rather than a fantasy idea of how i ought to dress in my late 40's.
Work out what suits you but also works for your daily life, and don't exclude anything because another menopausal woman on the internet says she can't wear it! What do you identify with? And what type of clothes make you feel really good when wearing them?
Once you can answer those questions, make a plan to try out different brands to see which work best for you. I was surprised after many years of considering Superdry a teen brand that they made excellent tees and trousers, of which I have many now (linen, cotton, slouchy tops, etc), all in much better quality fabric than anything i'd seen at Jigsaw or Whistles.
Of course you don't have to like what I do, but do try to get out there and try new things. If something is 'too young' you will naturally feel like an imposter in it (hot pants and a hello kitty bum bag perhaps, but hey, you never know!)
No individual shop caters to a particular body type, although many of course sadly exclude plus sizes.
I tried wearing 'older clothes' for years and it simply didn't work for me. I don't dress 'young' now, but I am a lot easier on myself and have more fun. Please don't think you have to start purchasing silk shirts, trench coats and boot cut jeans.