I'm not a native English speaker, so there may be some nuance I miss out on. But as far as I can tell, the implication of what you wrote was
I have good knowledge on point 1, limited knowledge on points 2&4, and somewhat decent info about point 2. I'm not disputing points 2,3&4.
It's very misleading to say that "Cuba is keeping itself isolated". Each year the UN votes to end the embargo/isolation imposed on Cuba by the US, with the vast majority of countries voting in favour of ending the blockade each time.
In the latest vote, in November, only Israel and USA voted against ending the blockade. Ukraine abstained. 187 member states voted in favour of ending the blockade
Make no mistake, the US is what has kept Cuba unjustly isolated for the past decades. Source: https://news.un.org/en/story/2023/11/1143112
The US sees anything that could shake their narrative of the world as a threat, even when that 'threat' is unfounded, and they massively abuse their economic and military power around the globe to keep others in line.
Well, there's REISUB https://en.m.wikipedia.org/wiki/Magic_SysRq_key