Congrats on the new 930! My thoughts:
1. Side saddle. Yes, be careful on installation, the gun will have functioning issues if it's too tight. I found that my 930 (SPX) was finicky with the bolt-on hard side saddles and I switched to the velcro type (3gungear or esstac). . .YMMV
2. As to the bolt handle it should just pop right in with the notch facing to the rear. What brand is it? I'd recommend the nordic, fits well and very light.
3. Which safety did you get by the way? As to install, I did the following (got this from another member on here and can't find his post):
a. tape down the original safety, has a ball / spring underneath and you don't want it flying away once you release the screw
b. Once I taped down the safety, I took a pair of pliers and carefully broke-off the current plastic safety, leaving just the screw.
c. now that just the screw is exposed (again tape plate down so it doesn't pop off), just use pliers to unscrew that funky screw. Making sure everything is held down, just put your new one on and screw in.