Is this a good first gaming PC for 1080p?

It may be worth checking local used listings for a reasonably priced DDR4 system, especially one with a Ryzen 7 5800X3D. Adding a modern graphics card could give you better gaming performance than buying the current parts at full price, but make sure the power supply and overall condition are good.

For similar money, an older DDR4 platform could let you spend more on the GPU. Something like a Ryzen 7 5700X with a B550 board and 32GB of DDR4 would still be capable, while a stronger graphics card would provide a much bigger gaming improvement than the current RX 7600.

The RX 7600 is fine for 1080p, but it made the most sense when it was particularly inexpensive. If you can find a good deal on a higher-tier card such as a Radeon 9070 or 9070 GRE, that would offer considerably more performance, although it may be more than you need for 1080p.

The build should work well, but I’d try to shift more of the budget toward the graphics card. A cheaper CPU, motherboard, cooler, case, and possibly power supply could free up enough money for a much faster GPU. Also, 32GB of RAM is preferable for a new gaming build, so use a 2x16GB kit if possible.

The individual parts are generally compatible, and the 750W power supply gives plenty of headroom. You could likely use a decent 650W unit instead, depending on the final GPU. You also don’t need such a large dual-tower cooler for a lower-power processor; a single-tower cooler would be enough. Cutting back on RGB, the motherboard, and the case could help fund 32GB of memory and a better GPU.