Possible for individual retail investor to acquire pre-ipo private equity share?

Hella fellas!

An individual retail investor who has been investing into publicly trading stocks. Have been into a single private equity before (all was needed was to show base pay over a certain number is all).

If one is really keen on investing into private equity of some companies (like Anthropic for example):

1. Is it possible to invest right now? How and where to do so? Is it reliable?
2. Should one if looking for companies like anthropic for long long hold - better to get into now or wait it out till it gets public?