I'm just getting back into brewing after a long break (2009 was last brew). I've made some stupid mistakes, but nothing that made my beer undrinkable.
Are you using teabags? Or have you got some hop pellets?
Seems I've learned a few basic rules to improve what I am doing. With what you have there, I'd get 2 litres of water and about 150gm of LDM dissolved in it, get it to a rolling simmer, 60-70 degrees, nothing too over active, - I've been using Galaxy pellets - but same for Cascade or Amarillo which are my tatse preferences - my mate suggests boil 30gm in at 20 minutes, 30gm at 15 minutes, and 30gm at 5 minutes before 'flame out'.
I've been told to boil in water with an SG of 1.040 for better results. That being said, my local home brew shop says he boils in plain water and gets good results.
Straight in the wort, no straining required. It will settle.
Don't bother with hop bags for pellets, they are just another thing to clean and sanitize. And they are a pain to clean really.
To improve this recipe, a mate of mine suggests only using Malt, so get rid of the BE2, and the LDM and replace with a can of unhopped pale malt. then boil hops as above. This is what I was doing years ago. Makes a better beer, with not much more investment.
I have also done my own hopping and made a good kit and kilo of my own.
(1.5kg unhopped pale, 500g LDM, 300g Mdex, 1kg dex, 250g candied honey, 2 juiced oranges and rind in boil) and going Cascade 30g 60 minutes, 20 g 45min, 25g 15 minutes and 15g 0 minutes and had great results. Little Creatures nearly. Also added 200g of Cracked Crytal steeped and sparged.
For this one of yours, boil as i suggested above, and you'll get some nice flavour and aroma added to the kit. I wouldn't worry about stuffing it up, just do it, with those ingredients, you cant fail. Sounds like you'll have a half decent brew that will only get you more excited about exploring hopping. If you dont want to waste the hops, just try 25gm at 20 minutes, and 25gm at 5 minutes. It'll add nice flavour, and isnt too risky.
Good luck.