SMaSH are the go to beginner beers, just pick a hop you like and use it and pure 2 row.
You could try this one. It's pretty simple. https://www.brewersfriend.com/homebrew/recipe/view/523784/cascade-smash
5kg of malt for a partial mash? Also that looks like the only fermentable. Am I confused about what a partial mash is? I imagined some mashing that was suplimented with some extract or other fermentable.