Greetings from the UK!

Hopefully I'll manage to pull this off I'm a complete beginner when it comes to building bikes.
The bike will be used more for fitness cross country no competitions or anthing extreme (or even close to extreme sports).

Long story short the plan is to build myself a 29er hardtail on a chinese carbon frame, I'm at the point where I'm still researching and trying to learn I've only bought the fork and the wheels so far.

The fork I gor is RockShox Recon RL Forks BOOST 29"/27.5" 130mm https://www.wiggle.co.uk/rockshox-recon-rl-forks-boost/

And the wheels I bought of amazon WTB STP i25 Mountain Bike Bicycle Novatec Hubs & Tires Wheelset 11s 29
https://www.amazon.co.uk/gp/product/B075KHFHF4/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

I'm looking at the frame next(when the next paycheck comes in about 5 days) and the plan is to run it on a 1xSRAM NX Eagle DUB 12sp Groupset (unless I can find something cheaper in 1x maybe a SunRace?)

I honestly don't really know what I'm doing and hope to not make some errors with parts compatibility.

In regards to the frame I'm thinking one of these two below (unless everyone has better suggestions)?

1.https://www.aliexpress.com/item/32499899961.html?storeId=1942488&spm=2114.12010612.8148356.1.4cff7019OTL2Cz
2.https://www.aliexpress.com/item/32707208629.html?storeId=1942488&spm=2114.12010612.8148356.3.4cff7019OTL2Cz

Thank you! any tips and ideas suggestions more than welcome!