pixel_player53289302 Hello 👋 and welcome to the forum 🙂
I’m sure other players will also offer advice, but I’ll try and briefly answer your questions.
When you open your warehouse you will see there is a tab called Inventory - anything you find there (including the daisies required to purchase decorations) can not be deleted or sold at the market place. The goods in the inventory also do not take up any warehouse space.
Everything else in your warehouses, can be sold at the market. In fact, in order to be successful at the game you ideally want to have a steady turnover of warehouse goods. If you really want to delete something from your warehouse, open the warehouse and click on the commodity you wish to delete - warning this cannot be undone. Generally, and especially at lower levels you want to trade as much as you can at the market.
When you look at your market you will see that most goods can be sold for 2 or 3 different materials - you must choose which you wish to trade your goods for each time you go to market. Simply select the ship you wish to use, open the market and select your trade.
Most players would strongly recommend that if you can trade a good for gems 💎 - you should
Finally, decorations - click on any of the 4 sites with the ℹ️ . A little scrollable menu opens - some decorations are free (the basic look). Some cost gems, and some cost 2000 daisies. Once chosen and paid for with daisies or gems, the decoration remains in that menu beyond the current event, and you can swap it in and out as you choose.
And finally, finally - if you haven’t turned on gem confirmation in the settings - do so!