Your OP - about the fear of speed - combat that fear with faith in the bike.
Its a simple machine designed to allow the wheels run fast and true with a human on top of it - let it do its job.
I know what you're saying, and I'm sure confidence that I'm in control of the bike and not going to fall off or crash just because I'm going fast is something that will come quite naturally with time. Feeling confident that I know what I'm doing on the road and am safe in traffic isn't going to come so naturally because it's twenty-odd years since I looked at the Highway Code or drove a car. But I'll get there, I'm sure.
As Tin Pot said, this is why we've all addressed that point:
Fair enough, I know I'm the one who brought it up. It's just that really I'm more interested in the basics of finding the right gear and cadence for riding at a given speed.
A well-maintained bike is a very efficient machine, so of course it feels very easy riding along slowly on the flat. It is a totally artificial exercise (*groan*) to try to get a good workout riding slowly on the flat!
You simply need to get used to riding your bike, and choosing the right gear and right route for whatever it is that you are trying to do.
Some people take a few weeks to get used to cycling, some a lot less than that. I used to live 1 km from the railway station where I arrived with my first (adult) bike; it only took me half that distance to relax and enjoy the ride home! If it takes you a few weeks, no harm in that - just keep riding and soon you will wonder why you had a problem with it.
Thanks. As I say, part of my problem is just a lack of familiarity with (and therefore confidence on) roads, largely due to being a non-driver. I suppose I didn't know till I got on my bike that riding at a pedestrian-friendly, running-on-foot sort of speed - 8mph? - was going to require so little effort.
What you're describing here is single speed. Just having a single speed at the back but by being able to stop pedalling. A fixed gear is like (kinda is but you can get one's with brakes I think) a track bike. When the wheels go round the pedals go round, you have to keep pedalling/
Ah, OK, thanks.
No, you should be able to find a gear suitable for towpath cycling, it just takes a little time to get used to your bike. Certainly you cannot expect to get breathless, or achieve any great exercise benefit from cycling slowly, but it is definitely possible
Yeah, I think the long and the short of it is that I need to cycle on roads if I want to cycle fast enough to get any sort of cardio workout... although I'm hoping there may be enough lock flights near me that the uphill bits of towpath will get my heart pumping a bit.