You didn't happen to notice the thread from yesterday did you?
https://www.homebrewtalk.com/f39/brewing-tap-water-115021/
Besides telling you it's OK to use tap water, many of us do....I'm going to give you the same additional advice that I gave the OP of that thread..since you used the clue words, "worried," "Ruin" and "Infect."
By your use of those words, it is clear that you have a typical new brewer fear that your beer is somehow weak, like a new born baby..and will be ruined or die of you look at it wrong...I want to put it into perspective for you, and save you a lot of new bewer nerves...
Beer has been made for over 5,000 years in some horrific conditions, and still it managed to survive and be popular....It was even made before Louis Pasteur understood germ theory....
If beer turned out bad back then more than it turned out good..then beer would have gone the way of the dodo bird, New Coke, or Pepsi Clear...
It is very very very hard to ruin your beer....it surprises us and manages to survive despite what we do to it...
I want you to read these threads and see..
https://www.homebrewtalk.com/f39/wh...where-your-beer-still-turned-out-great-96780/
https://www.homebrewtalk.com/f39/has-anyone-ever-messed-up-batch-96644/
And this thread to show you how often even a beer we think is ruined, ends up being the best beer you ever made, if you have patience....
https://www.homebrewtalk.com/f39/ne...virtue-time-heals-all-things-even-beer-73254/
There is a saying we have in the homebrewing community...RDWHAHB...make that your mantra and you will be a successful homebrewer...
Oh this thread is really good too...if you adopt the mindset in here you will do well...
https://www.homebrewtalk.com/f39/youre-no-longer-n00b-when-24540/
This ain't rocket science, or brain surgery...it's a hobby, not something that should cause you to worry...you will not make a mistake and poison yourself or your friends...You will not breath wrong and have your yeast die...so with that in mind....Don't worry, make beer.