"To quickly get high quality gear in World of Warcraft dungeons, even if you're new or inexperienced, you can use the following methods:
Join groups: Find groups with similar experience levels or friendly players willing to help newbies through the group search tool (LFG) or on the forums.
Mythic+ Keys: Participate in dungeons on Mythic+ difficulty with other players. The higher the key level, the better equipment you can get at the end of the dungeon. Or ask for boosting services
https://armadaboost.com/wow-boosting-services/dungeons-carries as an example here.
Improve your skills: Read class guides and videos to improve your effectiveness in combat and improve your chances of successfully completing dungeons.
Take advantage of crafting: Explore professions that allow you to create gear for your class. This can be a useful addition to the gear you receive in dungeons.
Upgrade your reputation: Earn reputation with various factions to gain access to unique gear that can be purchased from faction merchants.
Participate in Events: Participate in in-game events and world quests, which may offer additional opportunities to obtain equipment and other rewards.
By following these guidelines, you can gradually improve your equipment and skill level, even if you are a new or inexperienced World of Warcraft player."