There is an app called ACNH.Guide (which was suggested in this forum) that I downloaded yesterday. You can look at any villagers “favorite gifts”. It tells you their favorite colors and what style they like. It lists all kinds of clothing items they prefer. I have also used a site called: nook...
I sent Whitney a Seashell wreath in a welcome letter the day she was moving in. The next afternoon it was on her door. By the third day I was able to give her a daily gift. It may have helped that Felicity (peppy villager) had me deliver Whitney a gift on the second day (apparently they got in...
I have only received the flooring DIY and the pink and blue dress. On the rest of the days he has given me a pearl. I hope he starts giving me some furniture DIY recipes- they look so pretty!