>>15151498
Personally, I don't start with figures like Carl Sagan.
Studying from textbooks helps. However it could be boring. To combat this, I would try "History of...."
History of Math
History of Biology
History of Chemistry
Science have so many branches, look up for what interests you and just start from there.
Studying the history of a certain field of science help you understand the fundamentals of the field, like how in math, the first method of calculation, the symbols used to present the amount of something... For me these things creates solid foundation of a learner in the scientific field because you knew what information to hold on to and to let go. That's one way to be a scientist, you think logically and objectively.