The speaker imagines waking up alone on a different planet and asks a string of questions about what that would feel like. Would the place seem strange? Would they even remember where they came from? The questions come quickly, which gives the opening a nervous, wondering tone.
As the poem goes on, the speaker tries to stay hopeful. They picture meeting other people or species and hope they will be seen as harmless and accepted. But the poem admits that fitting in on the surface isn't the same as belonging. Any comfort would fade once the speaker realized they are not one of them. The line "No other peas in the pod" captures that sense of being one of a kind, and a little isolated because of it.
The mood settles from anxiety into quiet determination. The speaker expects to be "very lonely," but decides to learn to live with it and adapt to new places, people and situations.