What should i get done first?

A few days ago i brought my shitbox 2012 nissan sentra to firestone for an inspection. ((Is firestone a bad place to go? They charged quite a lot for it, but it SEEMS pretty in depth)) I need someone who knows more than me about cars to tell me what would be the most urgent things here to get repaired. Which ones do you think would be easy enough for me to just buy myself and follow a youtube tutorial? Im not a car guy at all, but if its a simple 10-20 min fix that i can easily learn then id rather know to save the money. ((I already got an oil change so ignore that one)) also tell me if those price estimates they gave me are accurate or not