portfolio, but i think i know where its lacking

my portfolio, but i think i already know where it is lacking

this is most of the artwork i have in my portfolio, i wanted to include different types of artwork so its kind of all over the place. from lurking here i know now that physical artwork is preferred, do you guys think that if i added 3-4 more physical designs that it would be good enough to find a studio to be an apprentice in? i am very dedicated, i really want to make it as good as possible. thankful for any advice