using roles to allow very specific task

Hi everyone, I’m new here and new to wp.
I’m planning to make a website and a related mobile app, but, as I’ve never used wp before, I need to know if I can do exactly what I have to.
My website will have a calendar (I checked some plugins already) and many users. The users can login to the website and then perform some changing to the calendar (anything else). I checked the roles docs and seems like I can assign with add/remove a specific role/cap to each user. I guess this also depends from the calendar plugin right?

Also, I’d like to track the last (let’s say 10) modifications that were made by the users and to set some days of the calendar as “unchangeable” for others than me.

Will wp allows me to do all this stuff?
Of course I can program php, sql ecc..

Thanks in advance
B.