Swamp you are always wet and have to account for the stamina effect.
otherwise its really no worse than anything else.
if you are prepared for the zone, then this will keep you alive:
- don't wade or swim unless farming leeches.
- don't play at night, until you have upped your gear
- avoid starred creatures and 'elite' draghr (they are fat, totally different look).
- blobs are a priority target when in melee range. Learn to bait them into gassing then kill them between cooldowns of it -- exactly the same as dwarf shaman breath is done.
- archers behave exactly like skeleton archers you already fought.
- melee are exactly like sword&board skeletons.
- abominations are slow and avoidable until ready for it
- surtlings are weak but fast, but avoiding the firey spawners, there is no reason to bother them right now (can farm later for cores and coal)

its really simple. starting out, locate crypts, which have green fire near them, and go in those. Once inside, use bow to kill stuff while keeping it blocked by the scrap piles (partial clear to make room to shoot is ok). After killing it all, clear scrap piles, smelt iron, and upgrade. After you have all your iron armor, the zone should be more or less tamed for you.