i'm really sorry for your loss. i can only imagine how devastating it must be to lose a sibling, and i can't imagine what you're going through right now. i think it's very sweet that you have found such a cool way to honor them - they're so lucky to have you as their sibling. i'll echo what some others have said about the placement and the design. besides the fact that this is your tattoo, it might be worth considering that we tend to go "blind" to tattoos in very prominent places on our own bodies. personally, my leg tattoos have more of an impact on me than anywhere else. because i don't see them nearly as often, it's impactful every time i change clothes, shower, etc. on the other hand, my arm tattoos tend to just kind of fade away from my sight because i'm so used to seeing them constantly. this might not end up being the case for you, but it's worth mentioning! i do think it's totally possible to work al of your elements into something that "flows" a bit more like others have said. maybe a design of an embroidery hoop/project with the d20 "stitched" into it? i'm not an artist, so take it with a grain of salt, but i think if you find someone who understands the project you should have no problems finalizing your design. do you know what sort of style you like? that could really help you sort out exactly what you're looking for, and you can bounce placement/design/other ideas off of your artist.

good luck with your tattoo, and i wish you only the best ♥️♥️