Which domain should I choose for my personal website?
Apparently, .com conveys a sense of credibility so that it would be the best option, regardless of whether you pursue things commercially or not.
It seems to me that .org doesn't suit a private homepage.
But for a private homepage, you can generally be creative and look for any other options that suit your biography (e.g. citizenship) or name (e.g. if your surname is Li, why not choose .li?) or interest (e.g. if you do research on marine life, then you could use .fish).
And for research-related purposes, there are also top-level domains such as:

.science
.engineering
.academy