To be honest, putting a bead of weld along a flat piece of steel is relatively easy, try welding two p[ieces of steel together at an odd angle, and then add in a small gap between the two..... we all have to start somewhere, don;t get me wrong, just don;t over estimate your ability too soon.... also, welding thinner steel such as exhaust pipe is interesting, and then even thinner bodywork, and if it's rusty, well, thats a whole new game..LOL
Well done though..... keep practising!