I am also beginner and I always lose at chess. :_( :_( :_( :_( :.( ;) ;) ;)
I looked at some of your games. (I'm WAY below you in rating) but IMO, you play way too fast. You frequently have more than five minutes remaining in your ten minute Rapid games.
I suspect you'd make much better moves if you took more time. (Some of the best advice I got as a newcomer was actually(!) to lose more games by timing-out.) I still stink, but I don't blunder-after-blunder as much.
I am also beginner and I always lose at chess. :_( :_( :_( :_( :.( ;) ;) ;)