I got all of this for $1,000! Riding/setup advice needed

I got my first full suspension for cheap! The bike itself retailed for $1,400 and by my math, everything here is around $1,750. The bike is indeed brand new and everything works great. The seller bought this bike, has a child, and was never able to use it.

Here's the breakdown:
• Giant Stance 2021: $1,400
• Demon United Podium Full Face Helmet: $80
• Cyclists CT-K01 ToolKit: $80
• PRO BIKE TOOL Torque Wrench: $50
• BODYPROX Knee Pads: $15
• Seivertron Dirtpaw Gloves: $20
• CHUMXINY Brake Bleed Kit: $25
• Muc Off Essentials Kit: $43
• Muc Off Sealant: $10
• Muc Off Puncture Kit: $11

Did I do good?

Now for advice. I'm coming from a hardtail that was way too big for me. This new bike feels amazing, but do y'all have any tips for riding my first full suspension? And do you have any tips for setting up my suspension? I ran into a particular issue where while I was pumping my shock to 200psi (I'm 200lbs) for a starting point before setting sag, my pump suddenly let all of the air out while I was pumping. It won't go above 150psi. This is my shock pump: https://a.co/d/hcq0c3n