is the Caro-Kann advance Botvinnik-Carls (as black) playable??

Very playable. The game will resemble a French more than it will a Caro with 3. Bf5 (kinda), but it's a very good, solid opening. A lot of people prefer 3. c5 to 3. Bf5, some being very good players. Just make sure you know what you're doing with the pawn structure and you'll find success. 

Is it playable? It's a mainline!

you're having trouble playing against the Shirov and the Tal and you think that by changing variation you will be fine? There is still a gigantic amount of theory to know and there are dangerous lines where Black has to make very hard moves. All of the material on 3... c5 except the Chessable LTR I saw had some mistakes in the analysis so be sure to pick that one if you want to learn it

Is it playable? Yes

Is it good? Yes

i play it all the time and its pretty solid but tricky at the same time

would you please give some arguments to your opinion rychessmaster1?

I play it as black and I can say it's perfectly playable

Sound, fun to play and also at our level 4.c3 is the most common move. Black has already equalised.

See this 

https://www.chess.com/analysis/library/pav1njKjC

Also 4.Nc3 is a a good move

the Modern scores better for Black than 1... e5 in the l*chess database, this doesn't mean c5 is better than 3... Bf5

Oh no, not another database argument!

It’s definitely playable and I played it a lot in the past year chasing master.

I think it’s arguably a better practical option for non-GMs than 3…Bf5 because it is more forcing and it allows fewer dangerous sidelines. 

I think the recommendation nowadays by everyone (even our silicon friends) is 3...c5. The 3...Bf5 lines can be quite difficult to understand (I personally cannot say I fully understand these lines), while 3...c5 makes its intention clear right off the bat to strike back in the center.

The downside? You do get the French bishop, although it is supposed to be okay. 

I'm not comfortable with a French bishop, but if you are then c5 is 100% better. Whereas with Bf5 you have to be good at multiple types of games, c5 is mostly the same. However, I feel bf5 gives White more of a challenge. But c5 is definitely playable.