Tower defense in another world

"What the hell!?" was my first impression as I was transferred to another world inside the dark forest where monsters roams and now 3 of them were chasing me, what can I do than run away as I hold my bitten right arm that was now cut. Dashing myself forward, I stumble inside a small fortress, a tower, and now I need to manage it to survive? My God, at least give me some sill forfuck sake! This is a story of how me, a 25 years old, only middle school graduate have to survive in a world where tower is the means of power and glory, can I manage it? Well, I don't know