Go ahead and press 'save.' You are not really committing to anything. Mixes are never really "finished" (even seasoned pros will hear a song they mixed years ago and then have to fight the urge to re-mix the song again). If you save your mix today, you can come back tomorrow and listen again (and probably make changes). Yesterday's mix will sound a little different tomorrow, often depending on the time of day, what other songs you have just listened to, even what you had for lunch. Your hearing and mood change constantly. Mixing is both art and science. And as you gain experience (and collect more tools and plug-ins) you will get better results. By saving a mix now you can use it to measure your progress, smile at your mistakes, etc -- meaning 'learn'.
Then, go back and re-mix it!
John