changing tyre sizes

This may seem obvious to some folk, but not to me, so I wish to check with you.
I have a 2020 discovery D300 landmark, which has come with 285 x 40 x 22" tyres, and as I want use this car on various farm tracks, these don't seem suitable. ( Probable use 80% road 20% off road )
I see five tyre sizes shown on the drivers door post, and I'm suspecting any of these would suit this car ?
Which wheels and then which tyres to buy? 255/60 R19, 255/55 R20 or 235/60 R20 and will defender wheels fit the car?
Thankyou for reading.

Chuck the numbers in here https://tiresize.com/tyre-size-calculator/

If you are driving taller wall tyre the ride will be a little better, softer.

We went down a size on our L322 wheel rim for the bigger sidewall cos of pot holes .

Keep the overall circumference in a close ballpark, but if that is the standard range as stated then stay within that.

You could probably sell you drug dealer wheels to somebody else

If you have to buy aftermarket rims, check weight limits and caliper clearance.

J