What you have all said does make a lot if sense and has narrowed me to look in one area and I will go for spd and not the SL type.
The reason I have been asking on here is that at the moment I can't leave my house due to my muscle in my calf. The nearest bike shop that will be any good (from another post that I made) is approximately 20 miles away. I guess I still have the 'car mechanic mentality' in that if a person doesn't know what they are talking about - that they can be sold anything. I was also looking for advice on whether shoes are widely available for when I try them on. My nearest stockists would be
Halfords and I was not sure if they would be a good place to try considering the bike that I have chosen.
After reading the advice that has been given I will certainly not be buying the shoes online or the pedals now. I do actually want to learn how to fit them myself because I also want to know for future purchases. I just want to get everything right first time and avoid unnecessary added expense of 'dammit these are no good - I must try something else'.
I had read (online) that the two hole system is not as good as the three hole system and that if I went to that then I would be wasting my money for pedals and shoes. That's what I was trying to avoid. I had (until now) presumed that the two hole system was specifically for mountain bikers and the three was for road bikers. This post has now meant I have a far better understanding of what I have been reading.
On the 'cheap skate' side of things - the bike is going to be bought online and I was hoping to buy everything in one place so that the day it arrives I can get started. As it is I shall order the bike and then go to a shop for pedals and shoes. At least now I have a better idea of what I am looking for.
Thank you very much for all your excellent advice. I would rather look an idiot here than face to face with a shop that I will hope to go back to for help in the future.
Regards
Claire