You should......
You should aim to be a good psychic artist. But that won't happen tomorrow, next week, next month or even next year. It took me at least three years to develop my gift to a stage where I could confidently give a drawing to someone and say "Yes,that is a decent drawing".
You should expect to practice, practice and practice some more. If you want to be a psychic artist and be a good one then keep that pencil on that paper and keep drawing! When a recipient recognises the person in the drawing or readily accepts the person in the drawing as a spirit guide, teacher or inspirer then you can say you are nearly there - but not quite.
You should be self critical. You may think you have drawn a wonderful picture but others may not think so and won't say anything in case they may cause offense. Ask the opinion of others about your drawings and even if their remarks may hurt a little, think of it as an angle you've not thought of and try to include it in your drawings. If it seems uncomfortable or it doesn't work for you then disregard it and carry, you haven't lost anything.
You should endeavour to find a church or development circle that will help you develop in a safe and controlled environment. You may decide to develop your message giving side of your mediumship to go with your drawings or decide to work with another medium, but in ether case you still the company of other developing mediums that has a trained medium as the leader.
You should not expect to take the platform three weeks into your development. You will be no-where near ready. As I said in the first paragraph , it can take years.
You should not expect to people to recognize you drawings right away. Unless you are a trained artist and can produce good likenesses of people ( which is rare as most psychic artists are not trained as artists). This is part of the practice, practice routine. You do this to improve your drawings.
You should not expect every recipient to appreciate your drawing in the same way you do. There have been times when I have given a drawing to someone who has recognized the drawing, accepted the message and then proceeded to slowly fold the drawing into four and stuff it into a pocket or, as one woman did, proceeded to stuff the complete drawing into her handbag and close it. In those situations, keep calm, keep your mouth shut and think kind things of that person. (very, very difficult to do but two out of three isn't bad).
Finally, you should respect this gift that spirit has given to you. They have chosen you because they know you are the right person for the job. Follow their teachings and their guidance and you can't go wrong. Having said that, I am the worlds worse for obeying spirits wishes but they know what I am like and are very patient with me. I soon toe the line.