I see that you want to play custom items on Dota 2. Custom items are cosmetic items that change the appearance of your heroes, weapons, couriers, wards, etc. They are created by the community and can be obtained through various ways, such as buying them from the store, trading them with other players, or winning them from events.
To play custom items, you need to have a lobby where you can enable them. A lobby is a private match that you can create or join with your friends or other players. You can customize the settings of the lobby, such as the game mode, the map, the teams, the bots, etc. You can also enable or disable custom items in the lobby.
To create a lobby, you need to go to the Play tab and click on Create Lobby. You can then invite your friends or other players to join your lobby. You can also set a password for your lobby if you want to make it exclusive. To enable custom items in your lobby, you need to go to the Advanced Options and check the box that says Enable Custom Game Items.
To join a lobby, you need to go to the Play tab and click on Browse Custom Lobbies. You can then see a list of available lobbies that you can join. You can filter the lobbies by game mode, region, language, etc. You can also search for a specific lobby by its name or password. To join a lobby that has custom items enabled, you need to look for the icon that says Custom Game Items Enabled.
I hope this helps. If you have any other questions, feel free to ask. Have fun!