10 litre batch
All the LME, 500g dextrose will give you an OG of about 1050.
15g of your hops (about 12% alpha acid) should give you about 35 ibus, 5g 5 mins before end of boil, 5g at flameout. 10g dry hop 3 days. (leaving 15g for next batch). Don't overdo the hops as there's no "body-building" stuff in there apart from what's in the extract, and the dextrose will thin it a bit.
This will give you a nice, flavoursome beer.
If the alpha acid is higher, reduce the boiling hops accordingly.
75 minute boil.
Yoiu'll need some yeast.