As others have said, its perfectly normal to be nervous. I worked on ships & shore stations (CW) for several years in my youth cannot even remember being nervous on the key. However......fast forward 45 years and I got my licence.... My 1st QSO...The key wobbled, I got confused. My CW went wobbly. So did my writing - I said the wrong things....... And did so for quite a few QSO's. But all the other operators were kind and patience. I too wrote out a template so I didn't forget things. Regarding procedure.... I'm not sure I see the point in sending......."BTU " as sending a "K" or a "KN" at the end of your transmission is asking for a reply anyway.