It very wrong to ever think bitcoin is unaccessible, everyone can buy bitcoin as you wish. You can also buy bitcoin using the dca method (buying bit by bit) or the lump sum method (in large portion) anyway that is more convenient to you.
And also the aspect of bitcoin is too hard to understand, capital "NO". There is absolutely nothing that after puting your time and commitment that you will not know or understand better. If you make a good research about bitcoin and everything about it you will surely have a perfect understanding on it.