Howdy. Welcome to the forum.
Tires: I figured my stock BT-023s were about 50% gone when I swapped them at around 4000 miles for T30s, a much better behaved tire.I seem to be easier on tires than most here for some reason. I started with the "recommended" 36FR/42RR, but gradually worked up to 40FR/42RR. That is my "standard" pressure.
Mods: Wait until you have put on at least a 1000 miles before you start modding. Then fix what bothers you the most. Then repeat until you have no more problems. The three usual problem areas are windshield, seat, and handlebars in no particular order.
In my case, the previous owner had installed an MCL (now out of business) riser plate. That worked well enough for me that I have not reinstalled the stock riser. Shortly after I bought the bike, I took a medium length trip (2700 miles). discovered that the wind was beating me up constantly. When I got back, I ordered a Yamaha Touring Windshield. All time bargain, about $115 when I bought it in late 2014. I thought the stock seat was "OK" (for certain values of "OK") so I opted for the larger (4" taller and 1" wider) Yamaha windshield.
Next year, a somewhat longer trip (4100 miles). When I returned I decided, the seat needed to go. I have a better, but not great seat, now. Next year, a 6000 mile trip. I have the ergos pretty well dialed in for me. Other mods: canyon cages and sliders, aux electrical bus and internal USB power for GPS and SPOT, extra lighting, and a few other miscellaneous mods.
If you ride after dark much, I recommend 3M safety film on the back of the saddle bags:
I have the plain black ones, virtually invisible in daylight, really obvious after dark, and inexpensive.
Good luck, have fun.