How obtainable is challenger ?

I have just started to play ranked consistently with small goals in mind, but i have started to wonder what does it take to get to challenger. There is so much to learn and keep in mind but is it actually obtainable for some random player. I think i heard challenger is filled with pros and streamers and up and coming pros. Are there any randos in challenger?

Who downvoted it is just a question

also ty for comments makes me respect the people in challenger a lot more.

Idk if anyone is still responding but what if your were able to get coached. Theres a lot of people saying how hard ot is to learn and improve byurself but what if you had soemone coaching. Wouldnt it be more obtainable then on your own.