I feel as if I'm not thinking like a chess player

Hi everyone. I recently picked up chess again after casually playing in school. I've found that I can be very inconsistent and have periods where I am giving 1450+ players a hard time and occasionally beating them one day and then struggling against 1200- the next. Here's a game I'm not exactly sure what I could have done, so I would look forward to hearing ways I could improve. Thanks

edit: meant Nf6 after move 4.

It's all about your composure man. Take time with your moves and build them around countering your opponents. Remember to always be looking for checkmate before looking for piece advantages and use openings that favor the early developement of your minor pieces. Castle as soon as possible and avoid getting forked by your opponent, if you know what I mean.

Best of luck to you,

~Kingz94~