Welcome to the Ark Grind! i'm curious what version of xbox? if its the xbox one X then you should be good. i started playing on PC years ago and i assumed it would look awful on console. i eventually tried it out on my ps4 pro and i ended up playing for months on console. i didn't notice a huge difference in terms of graphics but you will experience frame rate drops or crashes when going by large bases.
i recommend the Island for all beginners. get a good feel for the game and then when you have a good grasp of the game start a second character on another map. You can share tames and items using the obelisks. Each map has it's own unique traits that's worth checking out.
you'll run into tons of pillar spamming , so getting a good location will be challenging, but you'll find something. you'll have days where everything goes wrong, but then you'll have awesome days. don't get discouraged on those rough days. Have fun