Vocal problem

I think I have damaged my vocal whilst I've been practicing the vocals watching videos? I'm not completely sure as I'm new to singing and teaching myself please can anyone help me? 

Hi, Sati! Please watch this short video for some guidance, and if hoarseness persists for 2+ weeks please contact your doctor! https://m.youtube.com/watch?v=C69rzgZ7v3E

I was practicing the beginners videos 1-10 and I realised later you said not to strain your voice and go to high but this is what I did? How do I fix this now? 

Hi, Sati! If you're currently experiencing pain/strain/hoarseness, the best thing to do is rest your voice. Again, if hoarseness persists 2+ weeks, please check in with your doctor! 

Once you feel ready to resume singing, start with gentle exercises like straw singing, humming, or anything else semi-closed (NG, lip trill, etc). See below for tips on what to do when an exercise goes too high or low to be sung comfortably:

You can always drop out if an exercise gets too high or low to be sung comfortably. But before dropping out, try three things:

1. Modify the exercise to make it easier (ie: sing on a lip trill, hum or NN/NG instead of an open vowel or other syllable, if that's more doable). 

2. Sing most of the exercise, and just "think" (audiate, or sing in your head) the pitches you can't reach without straining or going sharp/flat. This gives your vocal folds an opportunity to still adjust and prepare to sing those out-of-reach pitches, even if just air comes out. 

3. Make sure you're shifting registers when necessary. For example, you may be unable to sing higher pitches because you're still in chest voice, in which case you'd need to "shift gears" and find your head voice placement.