Try signing up to one of the sky rides that are widespread. Often they're more social and have a range of abilities. Having a regular slot (weekend) might help with the motivation. Similarly, one of our shops has a social ride on Saturday morning and a speedy one on Sunday morning. The Saturday one attracts a range of abilities and has a good social element. As above, you've got to cycle within your capabilities but they may cover ~25 miles over 2-3 hrs (with a stop) and making a few mates is always good for motivation.