What I remember from listening to art advise on YouTube all day:

- Maintain a daily habit of practice.

- Keep practice simple. Too much variety is counter-productive.

- Twitter is best for new artists.

- Do not send a potential employer your DeviantArt page.

- An OC is a reflection of the creator.

- Getting good at art takes time so be patient. Years, even a decade or more may pass before you are able to make a living as an artist.