UAE's visa is one of the easiest(if not the easiest) visa to get. Provided you don't have any criminal case with them. You are good.
That 300k is just 3,000AED(Arab Emirates Dirhams) which is enough to get you a toyota Camry (pencil light) here. Naira is very useless. So that big money, na change.
P.S: UAE is not a country where you can live, its just a place where you can hustle for like 5years and leave for a better country. Depends on you tho. Forget all the pix you see on SM. LoL. 😂😂😂