after I dead from the falling from the stairs there was a god that gives me a second chance to live as he send me to isekai

???:Cause of your hardworking in your previous life I give you a chance to live normally with your own way in isekai...so enjoy your second life and I already put a skill in your options menu that maybe can help you...so have fun

Then suddenly I open my eyes and wake up and I felt dizzy

What...where the fuck I am now

I just wake up inside a cave while wearing normal clothes...then I stand up and stretch out a bit then I get outside from the cave and I saw a lake and a unfamiliar forest

Am I really in Isekai