You said boot sale, which makes me think you are in the UK. There are some,embers in the UK. In fact there was one that was trying to arrange a meet. Meets are the best place to learn to hone. Also the easiest aide to us is a loupe. Looking at the very point of the apex is really the best read as to if you apex is properly formed. The entire edge depends on the initial creation of the apex and then the refinement of it. You should watch gssixgun videos to get a further understanding of what I’m talking about. Learning to hone and shave at the same time is a substantial uphill battle. Starting with a well hone, quality blade makes the learning focused first on the shaving. They are two separate skill sets that are interrelated.