Museum

It was the same for me too other people helped me with my museum. I don't have any art but maybe others do

Hi Rach, if u have Redd on Harvs island u can buy a piece of art every day (as long as he not visiting your island already obviously) the piece u buy will change to a different one the next day. So u could potentially get 7 pieces of art a week but sum cud still be fake.

Make some good friends. Go to other islands to fish and catch bugs and ask friends to donate authentic art.

My friend code is SW-5275-9112-9912. Send me a friend request. I’ll help however I can ok. I have some art I can give you and you can come to my island to fish and catch bugs also.

If you're not opposed to time travel... You can Google "ACNH+farming art from Redd"