oh man, I totally feel u on that transition. I remember when I first swapped my D750 for the Z6... I was so paranoid about that single card slot failing or the battery dying mid-shoot. In my experience, the absolute first thing u gotta grab is a screen protector. I use the ULBTER Tempered Glass Screen Protector for Nikon Z6 which is only like ten bucks. Seriously, it's a small price to pay to keep that rear LCD safe from scratches. For batteries, yeah, the Z6 is way thirstier than the D750. I usually recommend the Wasabi Power Battery 2-Pack for Nikon EN-EL15b cuz they're around $30 and honestly work great, though u should always check compatibility with the latest firmware. I'd avoid super cheap unbranded ones though, cuz they can swell and ruin ur camera. Also, XQD cards are literal wallet-killers. I suggest the Sony G Series 120GB XQD Memory Card for about $180. Idk, I just think it's safer to have one reliable card than several small ones. Basically, keep it simple and dont overspend early on. cheers!

yo! basically just saw this thread and i totally get the anxiety coming from the d750. the z6 is a beast but yeah it eats power way faster than an old dslr. since youre worried about reliability, i definitely recommend staying with official gear where it counts... i have been so happy with my setup lately. here is what i suggest comparing:

• Nikon EN-EL15c Rechargeable Li-ion Battery vs Nikon MB-N10 Multi-Battery Power Pack. the 15c is the way to go for the best internal capacity and its backwards compatible. but honestly, if youre doing long video shoots, the mb-n10 grip is better cuz it lets you hot-swap batteries without killing the power. its a bit clunky tho and makes the setup heavy.
• ProGrade Digital 160GB CFexpress Type B Gold Memory Card vs Sony 120GB G Series XQD Memory Card. even though the z6 launched with xqd, i reallyyy suggest cfexpress now. it is literally so much faster for offloading files and more future-proof for your next body. just make sure your firmware is up to date!! also if youre doing video, a SmallRig Cage for Nikon Z6/Z7 2243 is basically essential to protect the body. i am a bit cautious with my gear, so i always use a SmallRig HDMI and USB-C Cable Clamp 2259 too so i dont wreck the internals by accident. peace

Bookmarked, thanks!

Like someone mentioned, the battery life is the biggest culture shock coming from a DSLR! I totally agree that spares are a must-have. One thing I really want to caution you about though is the card reader you pick up for those XQD cards. It is so tempting to grab a cheap generic one, but those things are notorious for poor heat dissipation. I have seen data get corrupted mid-transfer because the reader basically cooked the card! It is way more common than people think. Also, be super careful with third-party USB-C cables if you plan on charging in-camera. The Z6 is pretty picky about the Power Delivery spec, and using a flimsy cable can actually lead to some nasty voltage spikes. I am absolutely loving my Z6, but the electronics are definitely more sensitive than the D750 was. Stick to high-quality data gear and you will be golden!

Works great for me