1) silver jewelry market, you can go to Yogyakarta, Central Java, where there are many handmade silver jewelry factories. When you arrive in Yogyakarta, you can also visit Borobudur Pagoda, Prambanan Temple in India and Yogyakarta Palace, all of which are great attractions, which are highly recommended!
2) Indonesia has tens of thousands of islands, but almost 6000 of them have names. If you want to go to an island that few people go to, I can recommend you to go to Belidong, Belidong Island. I like this island very much. Last time I went, the sea I went by boat was crystal clear. Well done! If necessary, I have a familiar guide!
In addition, Lombok is also good, you can go diving, and there is a diving paradise in the northeast of Sulawesi, which is called a diving holy place by foreigners!
In particular, you can go to Komodo NTT Island and Komodo Dragon Island, and you can look up what Komodo Dragon is on the Internet. This island was previously declared as the new Seven Wonders of the World by Indonesia, but it failed, mainly because Indonesians did not actively vote online!
If you like diving, you can also go to Raja Anpat in Papua, because it takes five hours to fly to Jakarta and there are not many people there. You can consider it!
3) Jakarta is not a tourist city, but can be used as a transit station, and there are not many places to go, except Taman Mini, Kota, Monas National Monument and Independence Square. And there is no place to go for two days (one day to the miniature park, 120 hectares, you can walk for one day, and the other day to other scenic spots), unless you like to go to museums or shopping malls, that's much better.
4) Indonesia has more than 13000 islands (it is said that there are 17508 islands on the Internet, which is not accurate). In fact, you need to know the concept of an island. There is water around the island and there is at least one tree on it, so I believe no one has been to all the islands in Indonesia, because if you think about it, half of the islands don't even have names!
5) You're welcome, you can ask me! Try asking!