If there are places like in Avatar or Star Trek, I wouldn't hesitate to travel to outer spachere. If there are places like in Avatar or Star Trek, I wouldn't hesitate to travel there.

- This is a bit technical but Avatar is not a place nor is Star Trek, so need to put 'in' in between the two to show that you are specifically referring to worlds like Pandora in Avatar or whatever worlds exist in Star Trek - Traveling to outer space means to outer space not to the worlds you are referring to so replaced them with 'there' so you specifically refer to the places in these films

However, I think it's going tothe journey to these worlds would be be boring during the move to the destination. However, I think the journey to these worlds would be be boring during.

- You are talking about a hypothetical situation so you need to use the conditional tense 'it would be...' not 'it's going to be...' - Bit unnatural to say 'during the move to the destination', just reworded this to sound more natural

I want play garound and movie theater inin the spaceship at least. I want play around in the spaceship at least.

- Not sure if you meant something by 'playing ground' but that doesn't mean anything in English. Maybe you heard people say 'playing around' which just means to have fun - Not sure what you meant by movie theater in this sentence. If you explain what you were trying to say in a comment then I can correct what you were trying to say here.

I want at least a play ground and a movie theater in spaceship at least. I want at least a playground and a movie theater in spaceship.