Thank you for all the recommendations; I haven't made a purchase yet, and I'm taking your suggestions into account. I tried watching reviews on YouTube, but they all seem to be praising the devices, and it seemed too good to be true, especially considering the butterfly keyboard. Regarding where I'll make the purchase, I'm still searching on Amazon.
I'm from Mexico and have a budget of 11,000 Mexican pesos, which is equivalent to 624.08 dollars. Unfortunately, I can't afford to buy the MacBook Air M1 as it exceeds my budget. Regarding the MacBook Pro 2015, I couldn't purchase it because it's no longer available.
With that budget, I strongly suggest PC. You can get a pretty good (NEW) PC that will do all computing chores well. Apple people can't hardly consider such an option but $600 will buy a LOT of PC where key parts like RAM and SSD have much competition driving DOWN costs. Here's
a starter list of 5 under $600 that this source rates highly. A little online "shopping around" would probably find many other possibilities.
If you already have a monitor + keyboard + mouse,
new (but refurbised or education) Mac Mini seems best Apple option.
With that budget, a much recommended RAM upgrade from base specs will eat a third of the budget at Apple's relatively sky-high pricing ($200). The
same in a PC will be under $50. Similarly, get enough SSD to be comfortably "future proofed" for Mac and it can eat up to 2/3rds of the budget for SSD alone ($400)... while
1TB SSD retail for PC can also be had for < $50 or
double that for about $40 more (< 25% of what Apple charges)
Put both common upgrades together and only the 16GB RAM upgrade and the 1TB SSD upgrade will need ALL of your budget from Apple... vs. about $100 for a PC, so you can have $500 left over to buy the rest of the computer. Compare to- say- the first option in the 5 laptop PCs list and that one comes with 36GB of RAM + 1TB SSD, 15" screen and 8 hours of battery life for
UNDER your budget. OR come up with
$25 more to double the SSD to 2TB vs. Apple's 2TB upgrade price at $800 (for
ONLY the 2TB SSD upgrade- not the computer).
Will a Windows PC be BETTER than a macOS Mac? Clearly, Apple fans will have a very passionate opinion about that. But if $625 is your budget MAX and you need a good computer now, a bunch of total stranger's passions can't do anything for you. Use it towards the best computer you can get... which just happens to NOT be an Apple computer (unless perhaps a Mini if you already have a monitor + keyboard + mouse and don't need more than base specs RAM & SSD).
If me, I would NOT buy ancient USED Macs, already vintaged or about to be vintaged. macOS will leave the computer behind- if not already. Some software will just fail to work right and other software unable to update to newer versions won't be able to open any collaborative files created on someone else's newer Mac or iDevice. It's basically OVER for those old ones. Yes, they can still function and do some things but Apple themselves have opted to leave them behind. That will only get worse in the future as they get further behind.