Back yard - cleaning walls and painting

[RodneyTrotter]

We've taken down a shed in our yard so we have more room for a table and BBQ but before then we need to get it tidy. The walls have moss on them and the paint is pealing away.

What order do we complete the clean up? We thought it would be something like the following:

1. Pressure wash the walls
2. Put anti-fungal on the wall and clean
3. Put on white masonry paint
4. Put down new slabs etc

Is this how it should be done? What products would you recommend, how many coats, any tips etc?

Any help would be appreciated....from a DIY beginner!

Thanks.

 

[RodneyTrotter]

Is anyone able to help with this?

Thank you.