Software suits like Adobe and others can be extremely expensive and most of the time unnecessary. Sometimes you need some simple edit of an image and the professional expensive software like Adobe Photoshop is a total overkill.
Graphic design is a big deal. It is what takes a website and social media account that looks okay and turns it in to something really separated from the rest.
To make graphics I use a free online tool called Canva
The only significant limitations of the free version are that you cannot create transparent areas and you cannot resize your creations. Other than that, essentially everything is available to you.