Since you have a 7' mower, and a rake probably optimized for 9' cutting, you will need to figure out the best way to rake the hay windrows and feed the baler. With a 7' cut, you may be best off by raking 2 cutting windrows into 1 for baling. This give you some 'working space', too. Trying to rake 1 7' cut into 1 windrow for baling is a bit tight.
Keeping the baler running at 1 stroke per second will get you on track. I always recommend emptying the bale chamber completely at the start of each season to clean out the crap that gets lodged in there. Look for broken or tired springs in the mechanism, buy some extra baler shear pins, rake teeth, mower knives, guards and bolts, and check the belt(s) on the mower. By all means, set the tire pressures to recommended values.
You might try running the baler in a stationary mode before you actually need it just to get the sounds and fury of it all. Park the tractor at operating rpm and pitch old hay into the feeder and watch it all happen.
Having the owners manuals memorized is a big advantage. And a set of tools and extra parts on each machine is a big deal. An old ammo can strapped to the frame works for me. So, on the mower you keep teeth, guards and the wrenches to change them, on the rake you keep tines and wrenches for it, same for the baler. That's where you keep the manuals, too.
Start looking for helpers to get the hay into storage.... They'll want $50 and hour, an iPhone and a wifi available to be included in the employment package.