For brewers like v60, aeropress, hario switch, orea, they're typically very easy and quick to clean. The coffee grounds are being held by the paper filters. Just toss the filter and coffee grounds to the bin and rinse the brewer. With aeropress you just need to rinse the plunger.

In terms of time. It really depends on the brewer and pouring method of choice.

With immersion brewers (aeropress, hario switch, pulsar, etc), longer steep time usually means tastier brews, but it's not mandatory. 2-3 minutes is normally fine, but there's an aeropress recipe where you steep for 9 minutes. Immersion brewers are typically very forgiving and can give you tasty cups of coffee consistently. You can just set a timer and then clean your grinder or prepare breakfast or doing something else in the mean time haha

With percolation brewers (v60, orea, kalita, april, etc), you might want to do multiple pours to get the taste you want. For example, 5 pours of 50ml. So you don't just stand there doing nothing. There are plenty of different recipes with different pouring structures that can give you different cups of coffee. Great for experimenting.

And what does "normal coffee maker" mean in this context? Espresso maker? But normally strong or weak coffee depends on a lot of things. Coffee to brew water ratio, roast level, water temperature, etc.