Assume you have all the luxuries of a modern life in your Tardis (toilet, hot showers, TV, books, game console, …) which doubles as a mini self-sufficient apartment with it’s own energy stores and generation.
Where in history would you go if comfort wasn’t an issue?
I would stop my kid self from taking the concerta I was prescribed and instead get him to drink a cup of coffee every morning, and would also give him advice for when he stops being a Christian and his parents go apeshit and try to desperately bring him back into the fold.
Also I would prefer to use a DeLorean