Be sure to check out the
Crash Course if you haven't already. Tho, it's mostly informing those who haven't made a decision on what to buy. You've already bought your kit, so there's no turning back now for you!
Definitely find a friend or family member & get them to teach you a thing or two. In case you don't understand clutch basics, I'd also try to grasp the concept of a clutch & what it does -- pulling the lever
disengages the clutch (which is why you have to pull it while you're stopped, otherwise it'll just stall since it tries but the tires won't budge).
Also, I was gonna start a thread of the top 3 things I've learned from this site, but it'd end up being a lot like Large's Safety & Maintenance thread, so I'll just tell you!
(1) Get a kevlar tire, a tire liner, a puncture resistant inner tube, & a rim/spoke liner. Also, don't forget to check pressure every two weeks or so... and you shouldn't ever have to change an inner tube (maybe if the stem gets a hole in it, that's about it). It's amazing how long it takes to change a rear inner tube & how much time you can save by getting quality tires, tubes, & liners.
(2) Replace all nuts & bolts with Grade 8 stuff that won't bend or break like the Chinese stuff. And definitely don't forget the blue Loc-tite! Seriously, just tightening the mounting bolts won't be good enough. If you don't use the blue Loc-tite, you'll regret it like most everybody here has already done.
(3) Hog the road if you're using the road. This way, people will be forced to give you your space. Some don't give you space at all, and that could be deadly on roads with holes, cracks, dips, or whatever deformity you can think of. Especially with a hardtail like yours... you can't leave any room for error between the road & your tires.
G'luck with your build!!