i am making a mod from scratch but cant make it work, so some help about lua script is needed if possible

i am making a mod from scratch wich consists to add a feature for trucks, harvesters and tractors, due my lack of skill in lua and xml i reached a point that i dont have the knowledge to continue, so, if possible, i need some help from someone with more knowledge than me. i can share my work with the one who want to help. just contact me and we will talk about the project