hi, welcome. not exactly sure what you meant in your post about the beer geysering up, the text might have gotten moved around accidentally?
you can make a good beer with extract. i would go with something like 2.5kg dry malt extract of any kind in 20 litres of water, add some hops following a guide ie. east kent golding = 1oz at 30 minutes, 1oz at 20 minutes and 1oz at 3 minutes left in the boil (assuming a 30 minute boil since it's just dry extract) and use a recommended dry yeast, pretty much any of S-05, BRY-97, T-58, S-04, theyre all good and should be in better shape than a muntons yeast packet.
boil for 30 mins, cool it down as best as you can and/or leave it overnight. add yeast when its at room temperature. then wait at least 3 weeks without touching it. simple as.