BEST soundproofing without damaging existing wall in a room?

Hello everyone, I hope that someone can help me here.
I really need to effectively soundproof one side of my room's wall without messing up the existing wall. However, I need to know what materials specifically I need to purchase because I am entirely new to soundproofing in general. I've been reading information about it for the past weeks but I am still not sure which materials to purchase. I looked at hardware stores and I was recommended this...
440 1/2 in. x 4 ft. x 8 ft. R-1.2 Sound Board-206136 at The Home Depot

but I would really like to know from those who experience with this DIY soundproofing field hence I am here.
I basically need the best and best noise blocking method without taking out the wall.
In addition, I have a few questions regarding this:

Will it actually get rid of the noise of the music that's most likely turned on all the way up next door? (I live in a townhouse by the way)
What do I need to do with the electric outlet that's on that side of the wall? Do I need to just cut around it when applying the new material?
Can I still pin on or nail on the new wall? Will this affect anything?

Is buying a thick wall material better at blocking the noise? (I don't even know how thick the original wall is) How thick should it be?

What do I do about the bottom moulding of the wall? Do I just overlap it when putting the new one on?

Thank you in advance.

 

Welcome to the forums! Sadly "soundproofing" is almost a pipe dream. You can reduce sound, but it will require uncoupling static members between the walls. All your wall members are attached solidly to each other, and act like speakers to transmit sound vibrations. What you want to do is disrupt those sound vibrations. Adding a wall mounted on rubber all around, and insulated with products like Roxul will help immensely with sound transmissions. Impractical, sure. It is an answer, though.

Hang in there, as others will certainly trump me with better ideas. In the meantime, talk to the Beanie Head next door and tell them to lower the volume. Don't be nice, don't be mean. Be forceful, with a good game face on.

 

The hardest part is stopping all paths. You will be able to reduce sound coming through the wall, but it will find it's away into your room via the ceiling and floor. Also, if there is loud bass, that will be very difficult to reduce.

 

Thank you very much for the answers. Unfortunately talking to them is out of question since I've seen their antisocial behaviors to our property not too long ago so they obviously lack something simple as common sense.

All I want is some peace and quiet at least in my room. When their music is turned on, it literally comes to our entire house; all the floors.. So even though the loud daytime music can't be avoided too much, I at least really want to be protected from their TV noise because it literally sounds like it's located right next to my bed... Maybe this is at least possible?