My general portfolio advice for anyone applying to arts courses is include a combination of examples of iteration/development/design work (often the kind of thing you might do in school), some drawings from life (e.g. still life, figure drawing, technical drawing) and imaginative work (work that demonstrates combining ideas imaginatively). Some places might request a variety of mediums, and this is often course-dependent - I would expect in your case they would at least expect to see some painting and some drawing, which it sounds like you have. Always read the unique portfolio guidance for the courses you are applying to, as they may suggest other things they'd like to see i.e. they might value seeing large-scale works, or model-making, or whatever else. I would also imagine for a Fine Art course they'd like to see evidence of your understanding of the art world i.e. work that references other artists, or annotations on your work that reference this.
You may also benefit from looking at examples of successful applicant portfolios to the courses you are applying to on Youtube.