If you want a budget business-use or a home computer for just browsing and light tasks like Microsoft Suite or Google Suite applications, then consider  getting an APU, specifically an Intel APU with Iris Xe, one with Intel i5/Ultra 5/Intel i7/Ultra 7 branding or some Ryzen 5/7 with a G if under 8000 and non-F for 8000 and over generation. If  going for a more budget option, feel free to touch the 3's, just note that there is a lack of future proofing for more demanding updates and software.

On the goal of light gaming, slightly heavier business use, lean more towards the 7's and maybe 9's, here you might want to consider getting a dGPU if doing light CAD, video editing, or 3D Design. On heavy video editing and 3D design, the 9's would be a better choice.
On gaming, it depends on style, playing casual games or not very graphically intensive games, then shoot for the 5's on the CPU's. On the heavier side, go for 7's.

In a tight budget, go for a minimum of 8GB of RAM (either dual-channel or not), even in this economy, that should still be the standard.

Now looking into specifics, if all you are doing is browsing the web lightly, that's all you need, but once  you go into GSuite, Microsoft Office Suite, many tabs, and a mix of any of them, you should try to go for 16GB. You may be able to get away with 12GB if 16GB isn't feasible at the moment. (remember that if you are doing dual-channel, use the correct RAM slots)

Next, if you are going into software like CAD, light video editing, and maybe even light Gaming, 16GB is REQUIRED, and even more from 24GB to 32GB is better and recommended.

Finally, if you are doing heavy gaming, streaming, or heavy video editing, get 32GB of RAM, maybe even consider 64GB depending on your workload or having a wide mixture of multitasking of everything I stated already.