I'm not in a position to tell people yet. Never really did commisions or had a career job. If I had to describe my skill level, a subpar hobby artist. So take the advice below with a tub of salt. There are better people to tell you this information. It is my understanding on the subject matter after researching and life experiences.
There's objective and subjective points in art, fundamentals are objective, everything else is subjective. The Art fundementals are the basic building blocks or tool sets used to create. On Fundamentals, there are always more to learn. But defining what the fundementals are is a challange in its self. It's not straight forward, heavily overlapping and subject matter related. Ask 5 different people, get 5 simlar but different answers. If I could only pick 5, Form and Structure/Construction and Deconstruction, color theory, composition, perspective, line/markmaking. With a 6th hidden fudemental that won't help you get better, but keep you drawing. Finding the Fun. Learn to enjoy the mere process of drawing. Marc brunet answered in a video, he defined the fundementals of drawing as GESTURE, PERSPECTIVE, CONSTRUCTION, ANATOMY, COLOR/LIGHT, COMPOSITION, DESIGN. At draw paint academy website, they defined the fundementals as color, composition, value, form and structure, brushwork, perspective. Draw a box unconfortable here , defined them as Spatial Reasoning, Markmaking, Observation but specific to draw a box.
A pretty comprehensive list I like is the following 6 catagories: space, render, motion, anatomy, Cinematic, narrative. Space (Appearance as a 3-dimensional form): shape, volume, proportions, perspective; Render (Appearance as emotion and feeling): light, shadow, color, texture, edge control; Motion (Action in time and space): time, speed, gravity, inertia, gesture; Anatomy (Structure of living forms): muscles, skeleton; Cinematic (Experience is given to an audience): layout, composition, staging; Narrative (Message behind an experience): story plot, characters’ archetype. But even this breakdown isn't comprehensive, there might be other skills or appoaches that are outside or a combination of the above that don't fit in these six catagories. Animation, live drawing art, charactures, character design, gallery artist, story board artist, ect will probably all have diffrent requirements and emphasis on these fudementals and even have aditional requirements.
On top the fudementals, there are specific skills related to art and unrelated to make you succesful. Each Mediuem hastechincal knowledge, new muscle memory and dexerity reuired to use it well. Critique Accepting and giving critique are skills you will need to interact with your peers. How to do master studies. Outside of art you may need to learn computer skills. You might end up making website to set up an online porfolio or shop. Or more technical knowhow wo work with a product or team. If you are doing commisions, gallery or online sales, learning to do marketing and social skills so people know you exist. Lets not mention paperwork required to do taxes as a freelancer.
There are also four loose modes of art that we can draw in: practice, play, pleasure and preformance. Practice is the deliberate attept at improving while drawing. Play is exploring what can be done, experimenting. Pleasure is just doing what you like, your comfort zone. Preformance is creating finished pieces using the tools you have to archieve an outcome. It is worth noting that Practice is not Performance and play doesn't mean pleasure.