Another World Under the Rainbow

If I was walking and saw a rainbow close by  and than suddenly decided to walk under it like its nothing just to get teleported into another planet and or dimension I would a hundred percent get freaked out and would probably try to get out first, If it doesn’t work and I find out that I’m stuck here on this weird planet/dimension thingy , I would probably start panicking first than after at least five minutes of stress and sobbing I would try and find food and water supplies, I mean if I could breath at this weird planet/dimension thingy than there must be food and water here too maybe even living things too. For me I’m not very good at hunting and or catching things so at first I would try and get some plants or fruits, but this might not work for me well as these stuff would be a fifty percent covered in deadly or not made well for a human body to eat. So I would die in about half an hour there probably but if there are people like me for example people walked under this rainbow like me and got trapped here too you know and now I would have at least still a fifty percent survivor rate. Even if those people have food and water I cant fight with anything so they probably wont want me or I would just die in the first day or so. But yeah the planet/dimension I think in my mind would be a death trap that looks adorable after all some wild animals appear very cute but are very deadly and can kill you in seconds.