A river divides the land taking the lives of those who wish to harvest its bounty.
Build your castle to the north with four companions or to the south with two allies. either way you will become entangled war.
spend more times on details like irregular oasis, its no need if u put river to put oasis only there. Then hills... make it more multiple and realistic. Its your first map, so its not perfect. But work on in and it will be good.