Since I have had some time to kill updating all of my family's iOS devices to the most up to date iOS versions, I tend not to like to walk away from my computer when doing Apple mobile device upgraded/updates from iTunes on my computer, so I am back answering some iPad user issues here for a little while.
There are really no good Bluetooth stylii, any longer, for ANY older iPad models.
The commonly found, fine point, non-Bluetooth battery powered capacitive stylii need the use of special body electrical isolating drawing gloves to get some degree of palm rejection from your palm making screen contact marks in notes and drawing apps.
These gloves are not perfect and can still occasionally leave some stray marks, but these screen drawing gloves are much better than no drawing glove at all and allow you hand to move more smoothly across the glass screen while writing and/or drawing.
These can be found in various sizes and colors on websites such as Amazon.
This stated, you may want to seriously consider a new or “newer” ( used ) iPad model that is compatible with the original, 1st version of the Apple Pencil.
Starting with older 2015-2017 iPad Pro models that you can find much cheaper now that use the original, 1st gen Apple Pencil.
OR the 6th, 7th of 8th gen base model iPad versions.
If you can find them, the older 6th and 7th gen base model iPads can be purchased at much cheaper prices, now!
Even the newest 2020, 8th iPad can be found with up to $50-$60 discounts.
I finally acquiesced and purchase a 1st gen Apple Pencil for my 5-year old iPad Pro models a few months, ago ( I used a third party Adonit Bluetooth stylus for many years ), as iPadOS 14 has more fully integrated the Apple Pencil throughout the entire iPadOS 14 system, now, making the Apple Pencil more of a necessary accessory than an optional one.
So, it was time to switch my mindset about Apple's Pencil and embrace it with all of its pros and cons.
Best of Luck to You.