@anothermnuser123 apart from cost it will be what type of view you want.
My preference is the main grandstand on the Hamilton Straight. My reasons are you get to watch all the goings on in the pits (binoculars help), you get to see the race starts and finishes, the drivers loading on the truck/cars for the drivers parade. It is also covered so most seats get shade on hot days and potentially are drier on rainy days. The Mahiki T1 Enclosure grandstand is here with the hospitality not that far away.
However, if you want to see race cars at their best the grandstands that give views of say the run from Copse, through Maggotts and Beckets and down the Hangar Straight maybe better. Club Silverstone is here.
This link https://www.silverstone.co.uk/sites/default/files/pdf/F1%20Master%20Map%202023.pdf is a map showing the key entertainment areas, grandstands and paths. From memory the paths are wheelchair accessible. One of the lucky posters on this thread who go this weekend maybe able to post the really detailed map in the programme.
Silverstone also has an accessibility guide https://www.silverstone.co.uk/events/formula-1-british-grand-prix/tickets/access
A key one is to be able to see a big screen and to take binoculars so you can read the timings. Think about the weather and how far you will have to walk (a long way).
Other posters will have a different view as it is quite personal where you like to sit.