Many artists will have an online profile, CV, or website that they curate themselves. These are fantastic resources for your research because they can provide an overview of an artist's career, biography, artworks, and sometimes reviews or press featuring recent exhibitions.
If you are researching a contemporary artist, they likely have a curated website and social media presence. [Examples below.]
These are great places to START when investigating the background and practices of your artist. They often link to interviews, demo videos, or written works they've authored.
BUT in order to get a sense of the artist's impact and to understand how their work is interpreted and received, you MUST also remember to find sources that offer the perspectives of art critics and/or the larger (academic) art community.
Browse JSTOR's image collection of over 2 million rights-cleared art works and other artifacts from museums and heritage sites around the world.