Bike choice advice.

Hi all.
1st post so take it easy with me.
Have recently retired at the age of 66 and still reasonably fit and active.
Have decided to take up cycling as a hobby that will also keep me fit and occupied.
My preference when cycling is gravel towpaths and light riverside trails with normal roads
to and from riverside start and finish. But expect my riding to average out to be 50/50 road and trail.
Am anticipating ride duration to be anything between 2 to 4 hours a couple of times a week and
general errand running.
I have a budget of up to £1300 and am currently eying up a Trek dual sport 3 equipped, 2022 model for £950.
Is that a good choice or is there something more suitable/better out there that my many internet hours have not spotted?