How to correctly limit the speed in EdgeOS?

Question

network hardware

We have a dedicated Internet in 10Mbps.
20 users.
Hardware - Ubiquiti EdgeRouter X with EdgeMAX 1.9.0 firmware
Here is config
1 - Such a task: It is
necessary to exclude the most popular reason for the "fall" (clogging of the channel) of the office Internet - they are downloading something, watching streaming video at a speed equal to or greater than the width channel allocated by the provider.
Most likely, you need to limit the maximum speed of downloading something from the Internet by the user with the help of certain rules, set up some QOS rules (according to Google).
I know it's pretty easy to do in Mikrotik, but I have Ubiquity.
Please help with instructions on how to optimally solve this problem or, in extreme cases, with a sensible link.
So far, everything that I have found on this issue:
a - https://goo.gl/dbKaXa
b - https://goo.gl/j5hFYw
is not yet able to digest what is presented there and apply it in its configuration with current knowledge.
Thinking aloud: it is surprising that there are no ready-made scripts / a wizard for setting up such a seemingly elementary necessary option.
2 - In what way (experience suggests that this does not overlap with what I described above) can I limit (not prohibit) the speed of downloading torrents?
3 - If you just limit the speed per user to 5 Mbps, will this affect the speed and comfort of surfing? If not, what speed do you think is the minimum necessary for comfortable surfing?
It surprises me that I found only two links on such an important topic, so I will be glad even if you just tell me with keywords for searching :)
Thank you.