Relatively speaking, some people are surgeons and some people are butchers. Eventually you need the skills of both, the true power is to know how and when to apply them.
I wouldn't expect to have help every single day, your friends may have a lot of enthusiasm at first but eventually tire of the work. Not guaranteed but you can find yourself as the only one banging away at it quite often.
Not everyone can read a tape measure quickly and accurately. Not everyone's definition of level is the same. So it would be good to identify the skills of everyone and anoint a leader especially when it comes to critical parts of the build (cutting expensive timbers, etc)
One thing that saves a lot of confusion after you've made a pencil mark for a cut is to also mark a small "X" on the side you want the blade kerf to be on, if one person is marking and another cutting. Setting up a mitersaw station saves a lot of wonky cuts.
But on to can you do it? Yes, its a very good experience but it will take longer than you think. I'm about to click into the 4th year of building my shop, its close...and there has been some scope-creep into bells and whistles...and at times a little mental fatigue....but a great experience overall. Armed with new skills you can now go help your friends build their own shops and barns
One last thing, its really good to have drawings. Eventually there will be a time when there's a bit of confusion about how parts fit, and having a reference, even if its sketched on the back of an envelope, is very valuable. Also helpful is to draw up an idea for "the next step" as this can get everyone going on the same page before materials start to be cut and placed.