Hello and thank you so much! I am giving you the OK to do all that you've requested above.
For this next part, I'm copy-pasting something I've said before with some edits: Please make sure to provide a URL link to this page at every place that you promote the mod, along with the inclusion of some terms & conditions of your mod that reflects something along the lines of: "for personal use only; further modification and/or redistribution of the graphics within this mod is not allowed under any circumstance."
(Note to others that might find these comments: I'm only addressing and permitting @twinkle_twin22 in this particular case; anybody else with a similar idea, interest, or inquiry should ask me personally for permission in a separate comment somewhere on this page.)