Is this Micro Center bundle a good buy for my first PC?

It's a reasonable bundle if you want the 9800X3D. Compare the current prices of all three parts separately before buying. A bundle can still be a good deal today even if it used to cost less.

I wouldn't count on predicting when it'll drop again. If the total build fits your budget and you want to start now, that's a fair reason to buy.

I'd also look at the 7800X3D and 7600X3D bundles. They may leave more room in the budget for the rest of the build, though you'll want to check how much RAM each bundle includes and what upgrading it would cost.

Check game benchmarks at 4K with a GPU similar to yours. The CPU difference can matter less when the graphics card is the limiting factor, although that depends on the game and settings.

Check the 9850X3D bundle too. One comparison put it only $20 above the 9800X3D bundle. The performance gain is fairly small, so whether it's worth it depends on current pricing and how you feel about the extra heat and power draw.

Don't forget the remaining parts when comparing bundle prices. You'll need a CPU cooler, power supply, storage, and a case. Check that the cooler fits the case and supports the CPU, and that the power supply has the connections your graphics card needs.

The Lian Li 207 is one option, but check component clearances before ordering. Price matching on the remaining parts may also be worth asking about.