I recently upgraded from a 9th gen Intel i7 to a 14th gen i7. Only because the opportunity presented itself (my brother wanted a dedicated computer for astronomy image crunching).
Although the performance increase wasn't tremendous, it was noticeable.
As for your questions.
1. I'd recommend an Intel i7, 12th gen or newer. The 13 / 14th gen have a bad rap at the moment with the voltage issues, but I haven't seen any real world problems personally, and I do computers for a living. It's hard to buy a computer without a solid state hard drive these days, but if you buy one from a box store, make sure you have something solid state, and not the older magnetic / spinning drives that they may shove in, just because. Not that there is anything wrong with them, we still use them for mass storage and NAS's etc, but for your applications it makes more sense to have SSD of some type, and the speed benefit. 32GB DDR5 is lots for RAM, but get 64GB if it fits the budget.
There are finer details to all of this, but stick with components that are known. ASUS motherboards, Samsung make decent NVMe drives, get a good power supply - Antec / EVGA etc.
2. Yes, GPU can be a problem. I ran into the Nvidia issues and DPC latency problems. I ended up pulling out the card and just using onboard video, which is plenty for a DAW, but perhaps not enough for video editing, depending what you are doing. In that case, check out the AMD video products.
EL