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My question is can someone who is not well educated (secondary school graduate) understand the statistics of bitcoin investment or Bitcoin trading?
Bitcoin trading or investing is not based on how well your education is, even old people with their bachelor's degrees can't compare to those who trading bitcoin for years. If you want to learn about BItcoin it's better to start now and learn something small day by day along with your native education.
Even highly educated people have no guarantee they can make a profit in this market. Education level is not an entry criterion for bitcoin investment. As long as OP has passion, determination and constant efforts, nothing is impossible.
OP, being a beginner will inevitably have many difficulties and failures at first, hope you don't give up soon. If you don't get a good job because of your education then bitcoin might be a good alternative for you, you have a chance to improve your economy with bitcoin.