will it bud alrite

My plants are looking weird i Never top it or Fim it i just let it grow anyways the leaves are always turing yellow so i end up having to cut them so my plant only got leaves on the very top so the middle and bottom stem is all bare looking and also it is starting to bud will my harvest be smaller becasue of this and also wat did i do wrong to have casue this

also how much bud do u think i could get out of it it anit no special strain it just a regular weed plant