If You was suddenly teleported back in time 350mya to the beginning

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>if you was

>>8583811
I doubt anyone would.

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I don't know. The apex predators of the time were not dinosaur-tier, but they were no laughing matter either. The problem is that we don't know how fast or strong these things were, nor do we know how common they would have been. It's possible to spend three days in the wilderness without running into a big predator like a big cat or something, so I think this would be largely up to luck. Also, I believe that if I were able to see the predator coming, that I would be able to escape because humans are excellent runners and judging by their bodies these amphibians were probably not great at running long distances. However, if they attacked while I was asleep, they could win. So to answer your question: maybe, I think survival is not out of the question, but death is a distinct possibility.

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The high concentrations of CO2, while breathable, would weaken and disorientate you gradually over time

You may have trouble finding and identifying edible plants and berries. You would heed to remain near fresh water and therefore expose yourself to predatory amphibians that dwell near the waterline

>>8583885
Berries did not exist back then. There were no fruits of any kind.