People's Liberation Army is MUCH more well-equipped than military trained in Taiwan.
Per the Global Firepower Index (a measure of military capabilities), Russia is ranked 2nd while China is 3rd. Taiwan is ranked 21st whereas Ukraine is ranked 22nd.
What this suggests is that the difference in strength between China--Taiwan is about the same as for Russia--Ukraine, if not slightly narrower. If Ukraine can hold on after 150 days of fighting, then there's little reason to think that Taiwan can't do the same.
If the US is getting into this, this will turn into a much larger warfare(with the US more well-equipped) and could possibly lead to WW3. What Pelosi is doing is escalation.
Pelosi's visit requires no response from China whatsoever. This isn't even an official administration visit to Taiwan, but never mind that: if, hypothetically, the US were to officially recognize Taiwanese independence, China would be perfectly free to just ignore it and reiterate the PRC's stance on the issue.
If this unofficial visit is a provocation, then it's an objectively minor one. And in the first place, it's only because of China's unabashed sense of entitlement to somebody else's country that they view this as a "provocation" at all.
Which is to say that China makes its own choices. The US isn't forcing them to do anything.
At this point, what Peace is for the US is to just keep out for all potential wars
"Peace" as defined by the aggressor, not by the peoples and countries being attacked. The UN is still too weak and gridlocked to stop countries from invading, conquering, and forcibly annexing each other, or to stop one government from genociding its own people, so the absence of the United States is almost by definition the absence of peace.
The US has turned regional conflicts in Korea
The United States freed 50 million South Koreans from northern enslavement. This much is self-evident based on what we know about how North Koreans live today, 70 years after the end of the Korean War.
Vietnam
Again, a response to the north invading the south.
the Middle East
You're going to have to be more specific.
into a larger-scale bloodshed
That's only if you take the narrow view of things. If the US ignored Korea, Vietnam, and Iraq's 1990 invasion of Kuwait, it would encourage other countries to invade each other, since they would observe that they could do so with impunity. Before long, the entire international order would break down completely. This would prove much bloodier than how history unfolded the last 70 years in reality.
Just a few islands in the ocean
"The nine-dash line encompasses approximately 90 percent of the three million square kilometre South China Sea."
So assuming 2.7 million square kilometers, this is an area roughly the size of Kazakhstan. And China is taking over this entire area by force.
and a few disputed areas with India or something
China is also trying to steal territory from neighboring Bhutan.
China DEFINITELY would not want to act first in a war.
In that case, they just shouldn't do it. Nobody's making them.
They haven't for like almost a century.
Invasion of Tibet? How about their 1979 invasion of Vietnam?