Hi winterwind,
Good start! I love this piece, and have played it for many years, so I can give you my 2-cents worth of advice.

(BTW, messing up is part of the game, listen to my Mozart PC no 19 3rd mvt somewhere in the audition room, and hear several mess-ups!--live!)
Anyway, I think your general tempo is fine. You need to do more perceptible slowing down at transition points at ends of sections, etc. Also, Brahms is challenging in his use of several voices at a time weaving in and out. So be aware of horizontal melody lines which may be brought out. I don't hear enough melodic line, but a bit too much accompaniment. (Your piano may be causing the sound to be a little choppy, but be extra careful with legato.

)
In that short repeated section in the middle, play the repeat differently. And maybe do less pedal, because you don't want the beautiful lines to get murky.
Overall, you're doing great--This piece is sweet, tender, wistful...listen to your favorite pianist play it on a recording, and pay attention to the emotion evoked in yourself--then play in order to bring that to your listeners.
All the best, Teresa