First, you need a microphone. Don't use your laptop mic as it'll come out very bad. If you have a mic from a game or something than that can be of use. Download OREMO or Audacity to record the samples. I personally recommend OREMO as it already comes with a reclist and sends the samples to the folder you set. After you record the samples, now its time to OTO. OTOing is a bit more complicated, but there are many good tutorials for it
such as this one.
Now, this part is optional, but most people do this, creating a character. Now when you create your character, make them however you want, but for somethings to avoid look at
this guide. Also, its not required to give your UTAU a design, you can just do what Yamaha did for the VY's.
Finally, now that you've finished your UTAU now its time to show them off. Upload a cover to SoundCloud or YouTube, and make sure you listen to criticism people give you so you can improve.
Well, that's all I can think of right now. Hope you have good time here
EDIT: Also, start with a CV voicebank since your a beginner, and as you get better, then try and record a VCV one, and next time you need help, post it in the
Help and Advice forum.