You’re house will be lovely!
To my eyes, there are 2 problems with the outside: it looks a bit unloved and the very “glass” porch with the more solid door is odd.
So, I would spend some time sanding and prepping, then paint the porch whatever colour you like. A (boring but smart) slate grey would go fine. I’d cut back anything overgrown or messy in the front. I wouldn’t put in planters or containers unless you have time to look after for them.
It’ll instantly look more cared for, and though time consuming is a cheap fix with big impact.
Then I’d buy blinds for the door and windows in the porch, something that would match the external paintwork. Probably strong colours on a cream/ivory/white background.
And I’d buy some plants for inside the porch, to soften the difference between the big expanse of glass and the original external wall of the house. One reasonably big, but not-too-bushy house plant would be good.
It would have huge impact without distracting you from doing the inside. Personally Id leave the windows as they are (cost, practicality, maintenance) at least in the short/medium term.