I struggle with the letters N, S and R in a throw up if any one could give me some help it would be appreciated
If you don't have any ideas how they should look, I suggest you to just google "Throwup Grafitti Alphabet". DON'T COPY but get inspired. However if you don't know how you should connect them... just practice and remember that throwies are mostly kept close. Ps: I know my english is shitty af.
There is nothing wrong with copying a letter to start. Sketch it over and over and over... and over again. You'll make mistakes, some good and some bad. As you sketch / get up you'll favor the shape of a single or group of letters over others and it will transform your entire tag / throwup / piece... It would be foolish to think you are going to hit a home run your first time to bat, style takes a long time to develop. You should be constantly trying to improve YOUR style every time you sketch in your pad, tag a box, or hit a wall. Other writers might think you're toy as shit at first, but REAL writers will notice and respect the work you are putting in.