Help with Prestige

Hello, I am very new to Evolve Idle. From what I've gathered by reading guides and several posts, I think the first time I should prestige is before the Space Age, preferably with a large number of plasmids.

I've reached the atomic age (my first run) and was wondering how many plasmids I should try to get before prestiging, and how much stuff I would need to buy to get there. Thank you in advance!