I would certainly try before you buy , the reason I say this is because some spring powered pistols can be difficult power up ( I was thinking of your Arthritic arms/shoulders) . Have you had a search for a local club ? I would arrange with the club secretary to have a visit to the club and try some of the air pistols and air rifles that the club may own also some members may let you try their pistols under supervision.
I owned a Crossman 2300 Co2 pistol which was good but then i got into the whole modding scene and converted it into an air rifle , the Crossman 2400 "ratty" is also quite good but that is an air rifle rather than pistol but incredibly light weight. I then decided to change a SMK from Co2 to HPA whcih was rather powerful in fact I think that one is still in my loft somewhere. The only problem with using Co2 is you get less power in cold conditions.
I hope you have a steady hand because from experience even the lightest of pistols are quite heavy after a time with the out stretched shooting position.
@johnbaz is probably the best to give advice , have you seen his collection ? it is out of this world .
Good luck with your search and one final piece of advice I will give is be careful because it starts out being an air pistol and then an air rifle , then you put in for your firearms certificate which opens the door to rimfire rifles and shotguns .... I do miss my Rimfire rifles.