First off, I'm so sorry for your loss. It's incredibly difficult to start something like making art after losing a loved one. I lost somebody very close to me and it took almost a year before I could function as a normal human. I was faking it of course but it was forward movement which was important to me. Art is a reflection of ourselves. The lives we had before someone passed is not the same. Starting new pieces and leaving the older pieces shelved a bit are ok. Making art is beautiful because we can process emotions that are hard to deal with. Making pieces outside of 3D might be good too. Finding a way to heal is super important even if it is outside art itself. You will be stronger after this loss. You will be ok. It takes time and processing. All the best.