Getting yourself noticed as an artist is an art form in itself. There are quite a few ways to get your artwork noticed, but, besides really wonderful and original artwork, it does take effort, time, patience, and some luck. There are few "overnight sensations" in the art world, and it takes time in getting your work on the walls for people to see and admire. With online resources, there are even more options out there. Here are a few strategies. I'm in a similar position, as a retired art teacher I'm now selling my artwork, and here is what I have to share.
As a Student: I'm hoping you are showing your artwork in your school, as an art student it is good to get your work on the walls. Talk to your art teacher about opportunities. This helps in just getting your artwork ready for display, getting used to people looking at your work, and working on a portfolio of your work to show to other people.
Local Galleries and Art Associations: If there is a local community art gallery or artist association or artist club in your area, see if you can join and show your work in their exhibitions. I belong to such a gallery, and I have my work in their monthly shows, it is very satisfying, and I have made some sales. You might have to pay a membership fee, and there is often a fee (usually $5-$10 per item or less) when you have your work juried, plus a percentage (10-20% usually) if your art sells. Remember, most of these are "not for profit" galleries and need funds to do these exhibitions I have found these costs to be worth it. Nobody is getting rich from taking these fees.
Local Restaurants and Businesses: Many local smaller restaurants (not chains) often have artwork for sale on their walls. Check out your local restaurants or small businesses to see if any do this, and ask if you could show your work there. Again, you'll probably have to give them a percentage of sales.
Commercial Art Galleries: These are where art is a business, and they represent artists that they feel will sell. You could check them out, but beware, they often want more experienced artists, who already have a track record of selling their art. They will also take a percentage of your sales, usually 50-60%. This is the traditional way to get "noticed", but not the only way now a days.
Online Resources: Welcome to the 21st century! You could set up a website of your artwork. This takes work, but it would be nice to have, and nice to be able to reference when you show people your artwork. You could also sell from your website. Also, if you haven't already, set up an Instagram page (more visual than Facebook). or Facebook account and join some of the art user groups. A great way to connect with other artists and learn how they are presenting their work. You probably know more than I do about the use of hashtags, so use them to your advantage. I use Instagram, and I've been happy with it. You don't sell from Instagram, but you can refer them to your website or email, where you could arrange a sale.
Online Selling: Lots of artists seem to be doing well on Etsy, the online art/craft seller. It is easy to set up an account, but it does require a little money upfront before you sell. I've done Esty with jewelry, and it works OK, and there is a lot of online support for its members. There is however, lots of competition, and standing out on Etsy is a challenge. Also, there are online art galleries, such as Saatchi Art, which I am less familiar with, but worth looking into. Then there are companies were you can upload your artwork, and customers can choose to have your images put on different items, such as cards, t-shirts, coffee mugs and so on. You get some money when someone picks your art. Mint and Cafe Press are such companies. All of the above seem interesting, but, with the exception of Etsy, I have not put my art on them, so I am NOT endorsing them, just giving some information you might check out.
There are websites that act as clearing houses for art competitions throughout the US, such as "Juried Art Services".
With all of the above, there are probably others, and some Googles search may give you more ideas.
Finally, I would beware of anyone, such as an art agent, who promises to jump start your career but charges you some sort of fee. Check them out and get references from other artists before you give them any money or artwork. Also, never sign away the rights to your images to anyone without checking it out. With the exception of the "Not for Profit" galleries and associations, I would be hesitant about paying anyone a fee upfront.
I hope this will give you some places to start. Remember, the best way to help yourself get noticed is to have a really good portfolio of creative artwork that showcases your skills and your OWN original ideas. If someone says, "Oh that looks just like.....", you need to up your creativity. Again, I would talk to your art teachers for some help and guidance. Be patient and humble with everyone you meet. Best wishes.