.... Ian, I have just checked out your Instagram page and I think you have two strong options. Not in order of importance :
1 - If you want to promote sales of your work (my daughter has been very successful via Instagram).
2 - To be inspired by the work of others. By selecting who you Follow and also helped by who views and likes your work, your 'newsfeed' will quickly mostly consist of what you enjoy seeing and not loads of other stuff which doesn't interest you.
Personally I really like what you have already posted on Instagram. You have everything to gain and nothing to lose but as with all such online media, you tend to get back as much or as little as you put in.