As a new guy myself, I feel it is my responsibility to tell you that not everything will go 100% perfectly as planned... Don't worry about it! My first batch was a complete disaster from the moment it started until the moment I sealed the lid on the fermenter. You know what the best part was though? Beer was still made! Regardless of how many things I screwed up... My advice is to keep track of all the details with a brew journal for every batch that you do. Write down the successful steps as well as any "screw ups" you might come across. Any and all details need to be written down. Temperatures, time of each of your boil additions, original gravity, any possible detail you can think of. DO NOT fret the screw ups. Like I said, beer will get made regardless. Sometimes, even a screw up produces a GREAT beer. You are going to want to remember everything that happened in that batch so that you can replicate it down the road. Or, if it came out awful, you know what to avoid for the next time. The most important part of my newbie journey right now is cranking out batches and fine tuning my process for every batch. Having beer when all is said an done is just a bonus. With the help of everyone here, I have learned 10 new awesome things for every batch I have done.
99.9 out of 100 times, any questions you may have of "did I ruin it" or "should I just dump it" will result in a "no, keep going" response from everyone here. Our ancient ancestors knew nothing about germs and sanitization. In fact, to my knowledge they exclusively used open fermentation. Meaning they just had the beer sitting in an open pool or vat fermenting away all by itself with no problems! If they can do it for thousands and thousands of years with very little knowledge as to how/why it works, we can do it in our kitchens. That does not mean don't be careful... It just means don't be worried.
The final result of your beer is only half of brewing. The rest is the journey and your never ending quest to brew a glorious glass of liquid perfection...
Have fun and welcome to the obsession! Keep us updated on your brew day! First batches are exciting to hear about.