+1. I think lagers are amazing beers and an under appreciated style. When done right, they are very satisfying. I think you made an excellent choice with your first lager. God speed on this new adventure!I like the idea of the floor malted pils but you don't need any of that other malt. You will find recipes with other grains in them but I think they are unnecessary.
IBUs should be around 35-40.
Needs a lot more hops in the late boil. Should look closer to around an ounce at fifteen or twenty minutes and another ounce at flameout.
Czech pils also needs a soft water. Look at RO water with a small calcium addition if water chemistry is not something you are familiar with.