Since it's impossible, the question is moot.
MAGA! FAFO! Schrodinger's Cat walks into a bar, and doesn't. Dumbocraps: evil people who celebrate murder.

I'd go back to the womb, and have a different life altogether.

Excellent! Then you could visit The Big Bang Burger Bar!
MAGA! FAFO! Schrodinger's Cat walks into a bar, and doesn't. Dumbocraps: evil people who celebrate murder.

I would back as far as I could and see if the big bang theory was a lot of crap.

Oh, sure. Granted that I could go back as I am now with current knowledge, I'd like to see many different time periods. If I could only travel back to one place, I'm not sure.
Now, if I could travel back and be a child again, I'd take a swing at a do-over of life. Other than my writing, I have nothing to lose or give up. I love the thought of being able to go back with the information to undo mistakes and regrets.
Die young and save yourself

I would go back and give myself the winning Powerball numbers back when it was a billion dollars or whatever insane amount it reached that one time.
To hell with whatever that changes in the future.

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My regrets are very hurtful
That's good that your regrets are nothing more than cringe-worthy.
Confucius

I don't know if anyone can get through life without regrets.
I have regrets if I look back on individual moments. It's easy to look back at certain things and cringe.
Big picture-wise though, it all lead me to where I am now. I like where I am and wouldn't want to risk ruining it to change some cringe-worthy moments….
Grade "A" Fully Loaded
"Sexy as Hell"

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I don't know if anyone can get through life without regrets.
I have many and it's not a good feeling
Confucius

I wish I had another chance with my ex, my one true love. I accept full responsibility for screwing that one up, and it fell on me. If I could go back and know what I know now, I would have trusted and not made those stupid mistakes that I did.
"Your emotional state is not my responsibility." – Warren Smith

Well, you'd be rewinding time, erasing everything between now and Ancient Rome, meaning for example you could go back and kill your past timetraveling self over and over until your time machine gives out and you're stuck. Or you were always there and basically set fire to something while Nero ruled so you can't rescript anything even if you try.
But in a "wish granted by magic that eventually gets reversed" type setting, I guess I would visit some place in whatever era I wanted to draw inspiration from.
'(sigh) We humans are stupid egotistical self-deluded beings'

𝐸𝓇𝒾𝒸𝒶𝑅𝑒𝓃𝑒—𝒫𝓇𝒾𝒸𝑒

Nope. Too many things could wrong and catastrophically ruin the future.
"You had me at Elk Tartare"
-Erin Wotherspoon

And who knows what consequences it could pilot onto other people? Lol.
“There are no atheists in foxholes, eh?”-Keith Jennings from the Omen.

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Good point! Better to be safe than sorry
Confucius

No. I watched enough time travel movies to know the risks of altering history by doing so….
Grade "A" Fully Loaded
"Sexy as Hell"

I’d do the same, and I’d probably give them different last words before they hit their death bed.
“There are no atheists in foxholes, eh?”-Keith Jennings from the Omen.

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I would like to give my deceased friends and relatives one last hug
Confucius

Would it be to give them a farewell letter, or to spend one last excursion with before they discard their last tear before crossing the Jordan to the rainbow bridge? I’ve had several intimate friends get deceased, and I’d spare every last cylinder tissue on my back limb just to read a letter to them to cross it off my bucket list. I’d also sacrifice seeing the Seahawks win another Super Bowl.
“There are no atheists in foxholes, eh?”-Keith Jennings from the Omen.

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Thank you
Confucius

I like your answer best.
"Once more, Ackbar will rule the Galaxy, and… we shall have Peace."

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I would like to go back to visit departed loved ones one last time
Confucius