Hope you are doing good.
I take tour of your website your product line really impressive and also i checked your concern so to target your audience you should first start with marketing in that you can go with ads and for audience research you can use analytics.Where you will get data by age,interest,location etc.
But first i would recommend to do a research on Google trend related to your business keywords in that you can see three are more people interested in these product line.
I hope it would help you . Fell free to ask if any query are there.
This is an interesting one.
When it comes to art, your first destination should be Instagram.
Search for hashtags related to your products. Look for the artists using that.
Make a list and reach out to them. Start with the influencers to market and then move on to ads on Instagram.
If you don't have a heavy budget, start with lower count artists and move up over time.
This will take time but it's certainly doable.
Try FB Ads and Select interest as artists
I think you should start do marketing: SEO( Search Engine Optimization) or Paid Ads( Google Ads or Facebook ads).
Below are guides to help you start:
Hope it helps!