What to do now in animal crossing. i've got a golden shovel, and all I'm doing is talk to ppl and fish?

i've still got to pay tom nook mortgage, i've gon as far as having nookways and still way far to go to get an upgrade in tom nook's store. I still need to wait for rain to get the coelacanth but it hasn't been raining. I don't have any friends who have animal crossing ds so I can't go another town, I've sold and bought stuff from tom nooks and gone to booker for lost and found and designed clothes from mabel and caught all the bugs available, it's sooo getting boring. I've also donated fossils to the museum for the day. after that, what to do? I've also decorated my house in every decorations I have and went to redd's too and made my house nice with flowers, even stole them from neighbours. with one neighbour I did fishing contests and if I win i get an item from them but I don't want another item. i like my house as it is. donated 10,000 to boondox to get green feather but don't have much to get the rest of different coloured feather as well as writing letters to neighbours