Hi Tasha and welcome to EPZ and the Critique Gallery.
This is certainly a happy smiley picture of your friend and quite a fun portrait grabbed in the moment.
Your question is around you want to improve your portrait photography and ask for tips/advice on this. Using this portrait as an example there are some things to consider.
Firstly a portrait like this has its place. Its a fun almost abstract image that has bags of appeal and can be quite captivating. It is however very common in the social media world we live of the type of grab portraits people upload to social media sites of their friends and family. As a commercial portrait it is perhaps not very flattering for the subject.
The angle of view is quite wide which is due to your camera having its built in zoom set at the wider end of its range. A wide angle perspective will distort the subject as it has done here giving her a big nose and tiny forehead. To get a better and more natural perspective for portraits you are better at a narrower perspective. I believe this camera has a lens range number on the barrel so as it zooms out you can see its equivalent focal length. You want to have it set at the 80 to 105 range to get a more natural perspective for head and shoulders and half length portraits. For full length around 50 to 80 is where it should be.
Watch what is in the frame too. Here you have captured the environment you and your friend were in. This again can be a good thing but watch that things in the background do not become a distraction from the subject. Watch for clutter, busy-ness, highlights that pull the eye away from the subject.
Lighting is always key in photography. Built-in flash has its place too but is very direct and quite harsh. Picks out all those imperfections we all try to hide
. Try using softer light such as window light. Shape that light with card to shade or reflect light onto your subject. Worth reading up on lighting for portraiture. You don't need expensive studio flash as learning how to use natural light to its best first will hone your photography skills. Using simple angle poise lamps to create your own indoor lighting set up is also a great starting point in understanding light and shade.
Some other considerations.
Good to get catchlights in the subjects eyes. Gives life and sparkle to the subject.
Think about composition/framing. You can shoot portrait as well as landscape but consider how the person is framed.
Leave space for the subject to look in to if they are not looking directly at the camera.
Best advice I can give is to read up about portraiture. Look at as much portraiture as you can and try to emulate what you like. This shooting practise will help you develop your technique and understand technique. Above all understand your subject. Converse with them. Make them relaxed. Remember portraiture is at least a two way street for both the sitter(s) and the photographer.
I hope that helps.
Please enjoy the site and keep uploading your pics - you can learn lots on here.