Combat is text-driven. You will see messages describing attacks, wounds, spells and danger. Watch your hit points and other vitals. If things go badly, flee, retreat or stop picking fights above your weight.
The wimpy and wimpydir commands are there to express your survival instincts. Broadly, one controls when you try to run away and the other gives that panic a preferred direction. They are not a replacement for judgement, but they can stop a bad fight becoming a heroic disaster quite so quickly.
Progress usually comes from exploring, fighting appropriate enemies, completing quests, learning your class systems and understanding the world. Death is part of old MUD life, but reckless deaths are still annoying, so carry light, read warnings and do not assume every monster is there for a brand-new character.
If you die, do not panic-scroll. Read the death and afterlife text carefully. Old MUDs usually tell you what state you are in, what you have lost or kept, and how to get back to playing. Your first job after death is to understand what happened; your second is to recover your bearings without charging back into the same mistake.