Which solid defenses would you suggest me against 1.d4?..

I am looking for an easy to learn yet solid defence against 1.d4 because I am going to show up in a local tournement next week.Any help would be highly appreciated. 

You might take a look at this:

https://web.archive.org/web/20040308045118/http://www.jeremysilman.com/chess_instrctn_bgnrs/120603_crt_easy_op_rep_bk.html

Here's a little more basic repertoire information.  The second choice in this book against 1.d4 is the Tartakower Defense of the QGD which is what Silman recommended in the article I linked to in the previous post.  The book doesn't go into much detail, but it gives some options--Tarrasch Defense of QGD and Stonewall Dutch in addition to the Tartakower.  Also includes the French Defense for 1.e4, again not a lot of detail.

http://www.exeterchessclub.org.uk/chessx/pdf/JuniorRepertoire.pdf

since in the other thread the majority of peoply told you to play the Qd8 scandi against e4 play the slav both openings have a lot in common and are no that much theoretical good luck

Oh testa that is a great idea! Thanks a lot!.. 

Since you do not have much time to learn i suggest you check out chessable it is free they have a short and sweet series for the slav defense compiled by a master and a free scandinavian repertoire. The scandinavian repertoire is a bit bigger but still manageble. Even if your opponents know that you play the scandi and the slav they wont be able to to something about it.

Also dont be afraid of Bobby Talparovs Nf3 g3 etc you can still play a slav like formation with d5 and c6.

Against the english opening c4 you can play 1...c6 transposing to the slav and only need to know the line where white transposes it to a caro kann with 1.c4 c6  2.e4 d5             

klauer IMs Bartholomew and Trent say that the Qd8 scandi and the slav are similar you might migrate to their social media pages and leave your helpful comments there

1.He wanted an opening suggestion not basic guidance how to play better

2.If you would be at least so interested to take a 5 second look at the short and sweet chessable slav repertoire you would see that the master there goes for an easy to play approach that covers nearly all stuff white can throw at him.

https://www.chessable.com/opening-book/short-sweet-the-slav/5878/

 Have you considered the Nimzo and Queen's Indian defences?

Ich bin wirklich nicht hier um dich zu überzeugen, deine hilfe für den jungen kerl der nicht weiß was er in seinem ersten spiel machen soll war äußerst bescheiden

Die Kommentare unter dem freien repertoire sind durchgehend positiv und ich habe gegen einen IM in lichess ein draw erreicht mit diesem repertoire 7+2 casual 

You can sometimes transpose the game into more familar territory by playing something like ...e6 or ...c6, and if they then play 2.e4, you are out of 1.d4 territory.

möchtest du mir vielleicht noch kompliziertere wörter als quacksalber zurufen, daran erkennt man doch wie sehr dir daran gelegen ist verstanden zu werden 

I have been playing 2... Nf6 ,3..c5 and then g6 or e6 for long time but i do not know what this defence is called. 

If you really want to help me,then send me a private message. 

I often play English opening which is not a tactical opening and you recommend me tactics. That is weird,isn't it? 

It is very sad that I could have won the game on move 6. 

Play the slav. Here is a funny line:

What would you have us do, then?

I never had much success with the Slav, but I think it might be because it didn't really suit my style of chess + I might know too little theory in it.