A plan with measurements would help. It is difficult to judge the size of the space by a photo.

A quick styling refresh

If you want lipstick on a pig, get a tile makeover and temporarily hide the sins on walls. Change towel rails to match. Could remove wall and put in glass screens
But really a bathroom in this condition should be gutted to check the subfloor is not structurally compromised and mouldy.

@kate thanks, unfortunately my dad passed away recently and those ralings were put in place for him when he was sick .

@bigreader mate I'm not looking at ripping this thing apart, I was looking more at paint styling or whatever

If you’re selling, in all likelihood the bathroom is going to be replaced so you don’t want to waste your money. So unless the rest of the house is renovated just make sure it’s super clean, well ventilated and smelling nice.

@bigreader I'm not selling

You need to rip the shower walls off at a minimum.

As @daphnemaria has asked, are these painted cement blocks on shower and other walls. If so as daphnemAria has said. Paint everything white, using a mould free paint. Add a new shower curtain and keep it inside the shower recess so water stays inside the recess. But, this is a quick cosmetic fix. If you are living in or renting the home then morally, for the health of the occupants, you need to make sure there is no build up of mould and moisture under those shower tiles.

Are the shower tiles in good order? Are there any cracked tiles or build up of mould? If they are in good order, then give a good clean and re grout. If there are cracked tiles, then carefully remove all tiles from shower recess, install new tiles or acrylic panels. If your inclined maybe remove the shower floor tiles as well, and replace, or if in good order then give a good clean and re grout.

https://mrwetwall.com/product-category/wall-panels/?gclid=EAIaIQobChMI6IOxyoWh8gIVjZVLBR0Bdg2-EAAYASAEEgIcPvD_BwE#

Hi Anthony, the floor tiles look good and black and white is timeless so go wth that - get the wall tiles and floor tiles in the shower sprayed white and paint the vanity cupboards and window frame black, this will transform the bathroom and is the least cost option. Black, white and green looks great so add some forest green colour towels and some indoor plants in pots on top of the shower wall. If the budget will stretch remove the shower curtain and install a hinged glass screen and put a big silver framed mirror above the vanity (if you dont already have one, sorry I cant see if there is any mirror there or not).

Agree fix any problems and either spray or paint the tiles white or if you are adventurous black would look fabulous with the floor tiles and white vanity, a new shower curtain and great accessories and beautiful towels could look beautiful