Being that you are an older person I would assume you would want a bike that is more on the comfort side rather than a racing bike? if I'm not correct please let us know.
So as Uawadall I think an endurance bike would be more suitable as well, question is which one? there a lots to choose from so I will mention only a few that I think offer the best bang for the buck, though they're may others I don't know about that could be better deals.
So one of the best deals is the Pinnacle (known for their excellent aluminum frames that tested better than other AL brands in fatigue testing) Dolomite 3 Endurance bike that cost around 1,200 and comes with the very reliable workhorse of the Shimano groups the 105, I've seen Tiagra equipped models go for 1,900 so this Pinnacle is a very good deal.
Another one, which is good one for gravel, is the Orro Terra C 5488, it's a carbon frame with 105 components as well. That one runs at about 2,100.
If by chance you want a bike that will last a lifetime without ever the slightest worry about rust or corrosion and don't mind spending a bit more money to get those things then consider the Reilly Gradient (adventure bike for comfort) TITANIUM bike with 105! Yes it's titanium, lightweight, very comfortable as TI is known for, durable as heck, get a scratch just rub it out with a dark green 3m pad, no paint to touch up. How much you scream? starting at just 2,800 depending on options. It has clearances for up to 44mm tires or optional 50mm; comes with carrier mounts in case you decide you want to touring on it; and it comes with mudguard fixings in case you like that brown streak up your back or a dirty bike after a ride in less than ideal conditions; plus because it is intended for long trips it comes with 3 sets of water bosses instead of just two others have.
So there are my 3 choices, personally if you want a frame to last a lifetime without worrying about weather making the bike look horrible after a few years, a frame that can take a pounding without blinking an eye, a frame that doesn't fatigue, a frame that will last you the rest of your life as well as the life of whoever you will it to! LOL!!! I would get the Reilly. If you want to spend as little as you can and frame longevity is not an issue for you I would look at the Pinnacle. the Orro CF bike...well I'm not impressed with CF bikes durability, of course some will argue against that and that's fine, but a friend of mine who is a bike mechanic at a large bike shop has seen way too many CF frames come in damaged vs any other material, it's so bad he told me he would never buy a CF bike using his discount.
I have a Lynskey TI bike, and after riding on steel, aluminum, scandium, and carbon fiber I will never go back to either of those! While steel does give TI a good run for its money in the comfort department steel loses out in frame maintenance, you have to make sure you use waterproof grease so water doesn't get into the tubes, you have to keep it waxed, you have to touch up scratches as soon as they appear, etc, in other words you have to baby steel, not so with TI. All I do to keep my TI shiny is to wash it then spray some car spray wax on it and and polish, most people don't bother waxing TI but it will get a blotchy look to it if you don't, some like that appearance I don't, but thats me. TI also holds its value far better than other materials.
https://www.evanscycles.com/pinnacle-dolomite-3-2018-road-bike-EV306253
https://www.orrobikes.com/bikes/road/terra-c-adventure
https://www.reillycycleworks.com/co...roducts/gradient-complete?variant=49516925383