Agree with others that the Pro feels more in-line with your use case than the Air 4. Also agree that given rumors of an updated 2021 Pro coming soon (and even more so that the 2020 Pro has essentially a 2yr old chip that's a bit long in the tooth), I'd wait a few months - now's one of least optimal times to buy the 2020 Pro, and once the new one comes out, the 2020's can likely be found (even brand-new-in-box) at a discount.
This is what I did - I got my 2018 Pro (which I love) in 2020, BNIB, a few months after the 2020 Pro was released, and got it at a substantial discount.
This is what I did - I got my 2018 Pro (which I love) in 2020, BNIB, a few months after the 2020 Pro was released, and got it at a substantial discount.