Just find a cave and make a spear

Then you can live like humans have lived for 99% of their existence, with a cool crib around 52 degrees in most areas and there's ton of critters that like caves so you eat what you can kill with a simple spear.

What more do you want?

Shelter and food, that's all you really need, then you can go hunt some chicks and drag them back to your cave crib by the hair and make more little cave men monkeys just like most your ancestors were for hundreds of thousands of years.