If your iPad needs are not demanding, an iPad Pro maybe overkill for your needs.
Either take a look at the iPad 8th gen 128 GBs internal storage model OR if considering the iPad Air 4, the 64 GBs model is really a minimum baseline storage model that, in 2021, may NOT really be enough internal storage.
A 64 GBs storage iPad starts out with approx. 60 GBs.,after initial internal flash drive formatting.
Minus approx. 6.5 GBs for iOS/iPadOS leaves between 53-54 GBs.
Minus 3-6 GBs, for iOS/iPadOS system operational reserve, that MUST BE MAINTAINED AT ALL TIMES, to ensure/insure normal, expected operation of iOS/iPad OS, leaves approx. between 48-50 GBs of actual, usable data storage space.
A 128 GBs storage iPad starts out with approx.119 GBs.,after initial internal flash drive formatting.
Minus approx. 6.5 GBs for iOS/iPadOS leaves between 112-113 GBs.
Minus 3- 6GBs, for iOS/iPadOS system operational reserve, that MUST BE MAINTAINED AT ALL TIMES, to ensure/insure normal, expected operation of iOS/iPad OS, leaves approx. between 107-109 GBs of actual, usable data storage space.
256 GBs storage iPad starts out with approx. 238.5GBs.,after initial internal flash drive formatting.
Minus approx. 6.5 GBs for iOS/iPadOS leaves approx. 230 GBs. of internal data storage space.
Minus 3-6 GBs, for iOS/iPadOS system operational reserve, that MUST BE MAINTAINED AT ALL TIMES, to ensure/insure normal, expected operation of iOS/iPad OS, leaves approx. between 226-229 GBs of actual, usable data storage space.
So, a 128 or 256 GBs storage iPad model is what I would really recommend.
Also, you need to figure the costs of the Pencil and protective case.
A 8th gen iPad uses the cheaper priced Pencil 1st gen.
The iPad Air 4 uses the more expensive 2nd gen Pencil that charges atop the edge of this iPad.
Other factors to consider.
USB-C on the Air 4 is more convenient and flexible for externally connected devices than the Apple Lightning port on the cheaper 8th gen iPad model.
All iPad models, today, are sufficiently powerful enough to do everything, now.
All currently run the exact same iPadOS.
You are paying more for additional features in more premium model iPads
Best of Luck to You!