Actually we use pen and pencil daily. Now we only use brushes when doing calligraphy or we need write something big.
The left side is how you should write and print. And you should write like that if you want others to easily read what you write. And in school it's required to be written in the correct order of storkes, which I think some are reasonable, some are not.
This passage is write for japanese but most of the idea works for Chinese too.
https://www.tofugu.com/japanese/kanji-stroke-order/
And now we're using simplified Chinese, which means much less strokes. In Taiwan and HongKong they still use traditional Chinese, which looks nicer, but with a lof ot strokes.
Some traditional Chinese looks like (copied from wikipedia):
漢字簡化運動可追溯至新文化運動中關於文字及語文教言和國家發展的討論。
The same text but in simplified Chinese:
汉字简化运动可追溯至新文化运动中关于文字及语文教言和国家发展的讨论。