Welcome to Android Central! I'm a full-on Chromebook freak

and totally recommend it. Have a Pixelbook, Pixel Slate, HP Chromebook 14, and Lenovo Chromebook Duet. I hardly ever touch my Windows PC (and actively try to avoid it when possible). There are plenty of good models under $450 for your purposes, since the lower end Celeron processors should be fine for basic web activity that you describe. Personally, I like to go for at least a Core i3, and ideally an i5, which does boost the price a bit. I don't know much about the AMD processors, but anything with an A6 or higher will probably be good (although I wonder if there might be some Android app compatibility issues). Mediatek processors are slower, but the Helio P60T in my Lenovo Chromebook Duet provides reasonable performance (but since that one is more of 10" tablet, I don't expect to use it routinely for productivity).
Rowlette's recommendation for the Flex 5 is a good one -- currently $410 on Amazon:
https://smile.amazon.com/Lenovo-Chr...ated-82B80006UX/dp/B086383HC7?ref_=ast_sto_dp. Has a Core i3, 4 GB RAM (which is more than enough for routine usage), 64 GB storage, 1080p touchscreen.
If you're a Costco member and if you don't need a touchscreen, these two would be fine (the same or similar models are also at Sam's Club):
https://www.costco.com/hp-14"-chrom...eve-%26-wireless-mouse.product.100645883.html
https://www.costco.com/samsung-15.6...1080p---bonus-rf-mouse.product.100537931.html
With Costco (and I assume Sam's Club), you'd have the peace of mind that comes from being able to return it easily within 3 months if you don't like it.
Oh, and by the way, even though you're not interested in gaming, online gaming services like Google Stadia and NVIDIA GEForce Now work quite well on Chromebooks!