>>3616477/c/ is a very chill board with the exception of the odd /a/ shitposter who will wander off /a/. there are a good variety of threads and even if you don't see anything that really catches your eye, lurk for a bit and then make a new thread.
there isn't a ton of related art focused on doll from what i can see but i've only just started digging around. safebooru and pixiv should be your best sources for /c/ related art, twitter has some good irl images depending on who you follow. here are a couple of helpful tags to search; you'll have to go digging through to find higher quality artwork but it will be worth it to have it all listed out in a single thread here.
https://safebooru.donmai.us/posts?tags=doll_joints+&ms=1https://safebooru.donmai.us/posts?tags=doll&ms=1https://www.pixiv.net/en/tags/%E7%90%83%E4%BD%93%E9%96%A2%E7%AF%80/artworks?s_mode=s_taghttps://www.pixiv.net/en/tags/%E7%90%83%E4%BD%93%E9%96%A2%E7%AF%80%E4%BA%BA%E5%BD%A2/artworks?s_mode=s_tag 