"No such thing as bad student, just bad teacher. Teacher say, student do."
"Before the king seeks shelter, let the small warriors learn to walk; for a kingdom defended by undeveloped minds soon falls. Do not listen to those who chomp too much... when the mouth is always busy, the mind rarely is.”
Seriously... practice these basic opening strategies: here.
Borovicka is right. You lose because you make terrible blunders.
This is your last game:
https://www.chess.com/game/live/146682639150?username=anialab
On move 6, you had mate-in-1, but you missed it. On move 15, you blundered the queen and your opponent missed it. The next move you blundered the queen again and your opponent missed it.
Play a longer time control, use your time and think. Don't play random moves quickly.
Do not attack, be patient, stay focused and make sure no blunders
This is definitely not an advice to follow. You must attack! of course, carefully, but putting pressure on your opponents is the way to go. Nothing hasty, but without attacking there is no chess.
Doesn't it differ for people I usually just develop and wait
it does not really. I hear what you are doing, that is the very thing my students from the elementary school do. I teach them sound opening principles, they develop nicely, but than stop and just move the pieces around with no clear attacking idea. That is not proper chess. You must attack. As someone said here, that does not mean you have to find some crazy tactics and sacrifices, but rather accumulate pressure on your opponent's weak spots and threaten their king.
Try to develop the pawns and knights; if I were to recommend an opening to help, it would be the Italian Opening.
I suggest since your center is blocked, then try playing a open position. What I will do is play openings similar to the modern defense, which is moving the b pawn or the g pawn, then fianchtto the bishop, then develop the knight on the other side. Your opponent is most likely to have the e and d pawn pushed forward, so then push the pawn where it's protected by the bishop and the knight, since it attacks a pawn, they probably gonna take back. I think you understand the rest 
Personally, I prefer the Four Knights Game, as it will end up with your queen in the center or a pawn for lots of center control.
The best pieces for the center (or so I've been told) are the Pawns, Knights, and Bishops
They, are, you are risking less material in the center, while still taking a good hold of the center
If you want to start an attack, trade queens. They won't have their best defense anymore and this may give you a better position to unleash a powerful queenside attack with less defense on the queenside pawns
Develop minor pieces first, ideally striking the center. Then bring out pawns to free up minor pieces and help attack the center.
Um... The best defense is the best offense, don't be reckless and see if the offense is worth it
Step 1: play every day for 7 months. You have now succeeded at operation GIT GUD. I can confirm this as I got to 1974 OTB elo doing this
Good luck! May your rooks seize open files, your knights find unassailable outposts, and your queen join the attack at just the right moment!
If youre serious about improving, then you will need to do the following:
1. Follow opening principles:
Fight for the center
Develop towards the center
Castle
2. Blunder check your moves: "Are my pieces safe?"
3. After your opponents move ask yourself: "What is my opponent trying to do?
You will need to do this on each and every move. If you lose on time asking these questions, then you need to play a slower time control. If you choose not to thats fine, but you wont improve.
A LOT of people here ask for help to improve. IMO very few of them actually mean it. Honestly I think they just want tips and tricks that will help while they continue to play speed chess.