Sheet music signs help!

[tame cave]

I encountered this signs on the end of a sheet music
I'm pretty sure the double bars indicate to repeat a part of the sheet before finishing the song but i don't see which part
And i'm clueless abt the other ones

Also are these key signs the same?

[jagged remnant]

So in the first one not sure but i think on the previous pages there was somewhere with like a s sign.. u need to prob take it from there and instead of playing the things from G (like first two from down of the page) u prob directly play coda. Maybe to be sure search on youtube the song and you'll hear

[jagged remnant]

Nope. The first one is a time and a half and in the second pic they r short long notes idk how to explain

Like

Stacato

Idk how its called in English

[tame cave]

Ok i'll look forward to it

[tame cave]

Ok i get it i though it was kinda weird to have this signs since it's in 4/4

There is this s sign u told me i assume this is where i start also the music signs should be universal right doesn't matter if the sheet book i own is in japanese?

[jagged remnant]

I think its universal but not sure.

Prob safest choice is to search the song online?

[tame cave]

I watched a complete video abt these signs so it has no more secrets for me ! Exept for the dots under the keys grok couldn't help me but i'll find smth Ty!

[jagged remnant]

Npp!! Gll

[hoary fern]

In sheet music, a key refers to the flats or sharps found at the beginning of a stave (or lack thereof). What I think you mean is the note, not the key.

The dot directly above or beneath the note is a staccato dot. It is an articulation which means it doesn't affect the rhythm of the note. It means the note should have a lower duration than what is written and should not be connected to the note that comes after. It doesn't affect the dynamic, only the articulation.

[hoary fern]

The double barline you mean is this:

those two dots are the repeat signs. If it is a double barline but without two dots then it is not a repeat sign.

The D.S. at the bottom is an Italian abbreviation for Dal segno which means "from the sign". It means you should go back to this symbol and play from there until the end.

It could also be D.S. Al Fine which means "from the sign to the end". It means you should go back to the segno symbol and play from there until you reach the Fine text.

Lastly it could also be D.S. Al Coda which means "from the sign to the coda". It means you should go back to the segno symbol, play from there, and then when you see a crossed out circle skip to the coda which is a separate part of the sheet music.

segno symbol

coda symbol

[plucky summit]

D.S. Means “Dal Segno”. The “S” sign you mention is a Segno. So the D.S. Will mean to play from the sign. From there, there is likely a marking that says “Al Coda del Fine” or “Al Coda”. That marking tells you when to jump to the Coda.