2 things, join UKSAPS first, then buy a CO2 gas tank system for this tank. You have defined your goals for the most part it seems, fairly high light so CO2 will be the weakest link, generally it is for most folks, not the nutrient dosing which tends to be rather easy and far more controllable.
You will get local help, local resources for ferts, local help for CO2 gas systems etc and other local nuances. Best bet. You will learn more and have far fewer mistakes in a local group.
Not to mention save a lot of money.