Congrats on rep 60! :)

It also matters if you are upvoted by someone with a higher reputation score than yours.

That's actually not true, the FAQ is wrong on this point. The only thing that matters is that the voter has a non-negative reputation. The higher the vote value, the faster your reputation will increase. The reason it takes longer to get to higher reputations is that the scale is logarithmic.

If someone decides to flag you, your reputation score will decrease.

here comes the reputation dependency: Your reputation will only decrease if the downvoter has a higher reputation than you.