Some people find it hard to sketch in public, so why not get some practice in drawing people out of catalogues and magazines? The models are great – they don’t move! do one everyday and you will soon feel that maybe you do it from real life in a cafe or on the street.
Remember that you are not drawing a photograph. That’s what cameras are for. You are drawing a sketch. Your drawing does not have to be a portrait nor does it even have to look the same or use the same colours. It’s your sketch interpretation.
If you make a mistake, that’s great – we learn from mistakes. see if you can finish the drawing then have another go and see if you can get it right, Don’t abandon the drawing if you make a mistake – that can turn into a habit and you’ll never finish anything. Often you can save a drawing or painting by just keeping on going!