Hard and Complicated Questions ; Nerds Only.?

Okay so i heard time travel is possible according to Einstein's theory of the Wormhole.? And thru the Speed of light or close enough to the speed of light. Okay, if time travel was possible, wouldn't we see poeple from the future coming back to this time? Anways if it was possible, then it was cause a paradox destroying space and time, so it would destroy everything,? And cause unstability of time? it just seems to unreal. , if wormholes were real and not a theory but a fact, wouldn't it just travel us like a portal but not time ? It's confusing ? Help me out. ANDD if they were real we couldn't get past them with out them breaking off too fast, and it would take as much power as a star blowing up to go thru them, andd we would end up in a distance so far, that we wont be able to run back to earth to say we made it thru the wormhole, and if we could we may be in the past so they might not get the message. All this makes it a factor of how we wont be able to get thru a wormhole? am i right? LAST QUESTION: Isn't it more realistic and capable of time travel is going as close as possible as the speed of light. Going at that speed time slows down causing no damage, no factor and a alot simpler way of time travel? Thankyou .